diff --git a/docs/tutorial/beginning_decomp.md b/docs/tutorial/beginning_decomp.md
index 54fde940b8..149753d43b 100644
--- a/docs/tutorial/beginning_decomp.md
+++ b/docs/tutorial/beginning_decomp.md
@@ -666,8 +666,8 @@ extern ColliderCylinderInit D_80A88CB4;
 //         ELEMTYPE_UNK0,
 //         { 0x00000000, 0x00, 0x00 },
 //         { 0x00000004, 0x00, 0x00 },
-//         TOUCH_NONE,
-//         BUMP_ON,
+//         ATELEM_NONE,
+//         ACELEM_ON,
 //         OCELEM_ON,
 //     },
 //     { 170, 150, 0, { 0, 0, 0 } },
diff --git a/docs/tutorial/introduction.md b/docs/tutorial/introduction.md
index 80798cd35d..b9a658d531 100644
--- a/docs/tutorial/introduction.md
+++ b/docs/tutorial/introduction.md
@@ -33,7 +33,7 @@ void func_80A13098(EnFirefly* this) {
     } else {
         this->actor.params -= 2;
     }
-    this->collider.list->body.toucher.effect = 1;
+    this->collider.list->body.atDmgInfo.effect = 1;
     this->auraType = 1;
     this->onFire = 1;
     this->actor.naviEnemyId = 0x11;
diff --git a/include/z64collision_check.h b/include/z64collision_check.h
index bf411201d9..aa69dedb07 100644
--- a/include/z64collision_check.h
+++ b/include/z64collision_check.h
@@ -76,23 +76,23 @@ typedef struct {
 } ColliderInitToActor; // size = 0x08
 
 typedef struct {
-    /* 0x00 */ u32 dmgFlags; // Toucher damage type flags.
+    /* 0x00 */ u32 dmgFlags; // Damage types dealt by this collider element as AT.
     /* 0x04 */ u8 effect; // Damage Effect (Knockback, Fire, etc.)
-    /* 0x05 */ u8 damage; // Damage or Stun Timer
-} ColliderElementTouch; // size = 0x08
+    /* 0x05 */ u8 damage; // Damage
+} ColliderElementDamageInfoAT; // size = 0x08
 
 typedef struct {
-    /* 0x00 */ u32 dmgFlags;  // Bumper damage type flags.
+    /* 0x00 */ u32 dmgFlags; // Damage types that may affect this collider element as AC.
     /* 0x04 */ u8 effect;  // Damage Effect (Knockback, Fire, etc.)
     /* 0x05 */ u8 defense; // Damage Resistance
     /* 0x06 */ Vec3s hitPos; // Point of contact
-} ColliderElementBump; // size = 0x0C
+} ColliderElementDamageInfoAC; // size = 0x0C
 
 typedef struct {
-    /* 0x00 */ u32 dmgFlags; // Bumper exclusion mask
+    /* 0x00 */ u32 dmgFlags; // Damage types that may affect this collider element as AC.
     /* 0x04 */ u8 effect; // Damage Effect (Knockback, Fire, etc.)
     /* 0x05 */ u8 defense; // Damage Resistance
-} ColliderElementBumpInit; // size = 0x08
+} ColliderElementDamageInfoACInit; // size = 0x08
 
 /**
  * Affects the sound Link's sword makes when hitting it, hookability,
@@ -112,11 +112,11 @@ typedef enum {
 } ElementType;
 
 typedef struct ColliderElement {
-    /* 0x00 */ ColliderElementTouch toucher; // Damage properties when acting as an AT collider
-    /* 0x08 */ ColliderElementBump bumper; // Damage properties when acting as an AC collider
+    /* 0x00 */ ColliderElementDamageInfoAT atDmgInfo; // Damage properties when acting as an AT collider
+    /* 0x08 */ ColliderElementDamageInfoAC acDmgInfo; // Damage properties when acting as an AC collider
     /* 0x14 */ u8 elemType; // Affects sfx reaction when attacked by Link and hookability. Full purpose unknown.
-    /* 0x15 */ u8 toucherFlags; // Information flags for AT collisions
-    /* 0x16 */ u8 bumperFlags; // Information flags for AC collisions
+    /* 0x15 */ u8 atElemFlags; // Information flags for AT collisions
+    /* 0x16 */ u8 acElemFlags; // Information flags for AC collisions
     /* 0x17 */ u8 ocElemFlags; // Information flags for OC collisions
     /* 0x18 */ Collider* atHit; // object touching this element's AT collider
     /* 0x1C */ Collider* acHit; // object touching this element's AC collider
@@ -126,10 +126,10 @@ typedef struct ColliderElement {
 
 typedef struct {
     /* 0x00 */ u8 elemType; // Affects sfx reaction when attacked by Link and hookability. Full purpose unknown.
-    /* 0x04 */ ColliderElementTouch toucher; // Damage properties when acting as an AT collider
-    /* 0x0C */ ColliderElementBumpInit bumper; // Damage properties when acting as an AC collider
-    /* 0x14 */ u8 toucherFlags; // Information flags for AT collisions
-    /* 0x15 */ u8 bumperFlags;  // Information flags for AC collisions
+    /* 0x04 */ ColliderElementDamageInfoAT atDmgInfo; // Damage properties when acting as an AT collider
+    /* 0x0C */ ColliderElementDamageInfoACInit acDmgInfo; // Damage properties when acting as an AC collider
+    /* 0x14 */ u8 atElemFlags; // Information flags for AT collisions
+    /* 0x15 */ u8 acElemFlags;  // Information flags for AC collisions
     /* 0x16 */ u8 ocElemFlags; // Information flags for OC collisions
 } ColliderElementInit; // size = 0x18
 
@@ -349,28 +349,28 @@ typedef struct {
 #define OC2_TYPE_2 OC1_TYPE_2 // Has OC type 2
 #define OC2_FIRST_ONLY (1 << 6) // Skips AC checks on elements after the first collision. Only used by Ganon
 
-#define TOUCH_NONE 0 // No flags set. Cannot have AT collisions
-#define TOUCH_ON (1 << 0) // Can have AT collisions
-#define TOUCH_HIT (1 << 1) // Had an AT collision
-#define TOUCH_NEAREST (1 << 2) // If a Quad, only collides with the closest bumper
-#define TOUCH_SFX_MASK (3 << 3)
-#define TOUCH_SFX_NORMAL (0 << 3) // Hit sound effect based on AC collider's type
-#define TOUCH_SFX_HARD (1 << 3) // Always uses hard deflection sound
-#define TOUCH_SFX_WOOD (2 << 3) // Always uses wood deflection sound
-#define TOUCH_SFX_NONE (3 << 3) // No hit sound effect
-#define TOUCH_AT_HITMARK (1 << 5) // Draw hitmarks for every AT collision
-#define TOUCH_DREW_HITMARK (1 << 6) // Already drew hitmark for this frame
-#define TOUCH_UNK7 (1 << 7) // Unknown purpose. Used by some enemy quads
+#define ATELEM_NONE 0 // No flags set. Cannot have AT collisions
+#define ATELEM_ON (1 << 0) // Can have AT collisions
+#define ATELEM_HIT (1 << 1) // Had an AT collision
+#define ATELEM_NEAREST (1 << 2) // For COLSHAPE_QUAD colliders, only collide with the closest AC element
+#define ATELEM_SFX_MASK (3 << 3)
+#define ATELEM_SFX_NORMAL (0 << 3) // Hit sound effect based on AC collider's type
+#define ATELEM_SFX_HARD (1 << 3) // Always uses hard deflection sound
+#define ATELEM_SFX_WOOD (2 << 3) // Always uses wood deflection sound
+#define ATELEM_SFX_NONE (3 << 3) // No hit sound effect
+#define ATELEM_AT_HITMARK (1 << 5) // Draw hitmarks for every AT collision
+#define ATELEM_DREW_HITMARK (1 << 6) // Already drew hitmark for this frame
+#define ATELEM_UNK7 (1 << 7) // Unknown purpose. Used by some enemy quads
 
-#define BUMP_NONE 0 // No flags set. Cannot have AC collisions
-#define BUMP_ON (1 << 0) // Can have AC collisions
-#define BUMP_HIT (1 << 1) // Had an AC collision
-#define BUMP_HOOKABLE (1 << 2) // Can be hooked if actor has hookability flags set.
-#define BUMP_NO_AT_INFO (1 << 3) // Does not give its info to the AT collider that hit it.
-#define BUMP_NO_DAMAGE (1 << 4) // Does not take damage.
-#define BUMP_NO_SWORD_SFX (1 << 5) // Does not have a sound effect when hit by player-attached AT colliders.
-#define BUMP_NO_HITMARK (1 << 6) // Skips hit effects.
-#define BUMP_DRAW_HITMARK (1 << 7) // Draw hitmark for AC collision this frame.
+#define ACELEM_NONE 0 // No flags set. Cannot have AC collisions
+#define ACELEM_ON (1 << 0) // Can have AC collisions
+#define ACELEM_HIT (1 << 1) // Had an AC collision
+#define ACELEM_HOOKABLE (1 << 2) // Can be hooked if actor has hookability flags set.
+#define ACELEM_NO_AT_INFO (1 << 3) // Does not give its info to the AT collider that hit it.
+#define ACELEM_NO_DAMAGE (1 << 4) // Does not take damage.
+#define ACELEM_NO_SWORD_SFX (1 << 5) // Does not have a sound effect when hit by player-attached AT colliders.
+#define ACELEM_NO_HITMARK (1 << 6) // Skips hit effects.
+#define ACELEM_DRAW_HITMARK (1 << 7) // Draw hitmark for AC collision this frame.
 
 #define OCELEM_NONE 0 // No flags set. Cannot have OC collisions
 #define OCELEM_ON (1 << 0) // Can have OC collisions
diff --git a/src/code/z_actor.c b/src/code/z_actor.c
index 96d8244d91..d9b7f579c5 100644
--- a/src/code/z_actor.c
+++ b/src/code/z_actor.c
@@ -4324,24 +4324,24 @@ u8 Actor_ApplyDamage(Actor* actor) {
 void Actor_SetDropFlag(Actor* actor, ColliderElement* elem, s32 freezeFlag) {
     if (elem->acHitElem == NULL) {
         actor->dropFlag = 0x00;
-    } else if (freezeFlag && (elem->acHitElem->toucher.dmgFlags & (DMG_UNKNOWN_1 | DMG_MAGIC_ICE | DMG_MAGIC_FIRE))) {
-        actor->freezeTimer = elem->acHitElem->toucher.damage;
+    } else if (freezeFlag && (elem->acHitElem->atDmgInfo.dmgFlags & (DMG_UNKNOWN_1 | DMG_MAGIC_ICE | DMG_MAGIC_FIRE))) {
+        actor->freezeTimer = elem->acHitElem->atDmgInfo.damage;
         actor->dropFlag = 0x00;
-    } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_FIRE) {
+    } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_FIRE) {
         actor->dropFlag = 0x01;
-    } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_ICE) {
+    } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_ICE) {
         actor->dropFlag = 0x02;
-    } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_UNK1) {
+    } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_UNK1) {
         actor->dropFlag = 0x04;
-    } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_UNK2) {
+    } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_UNK2) {
         actor->dropFlag = 0x08;
-    } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_UNK3) {
+    } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_UNK3) {
         actor->dropFlag = 0x10;
-    } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_LIGHT) {
+    } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_LIGHT) {
         actor->dropFlag = 0x20;
-    } else if (elem->acHitElem->toucher.dmgFlags & DMG_MAGIC_LIGHT) {
+    } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_MAGIC_LIGHT) {
         if (freezeFlag) {
-            actor->freezeTimer = elem->acHitElem->toucher.damage;
+            actor->freezeTimer = elem->acHitElem->atDmgInfo.damage;
         }
         actor->dropFlag = 0x40;
     } else {
@@ -4361,24 +4361,24 @@ void Actor_SetDropFlagJntSph(Actor* actor, ColliderJntSph* jntSph, s32 freezeFla
         if (elem->acHitElem == NULL) {
             flag = 0x00;
         } else if (freezeFlag &&
-                   (elem->acHitElem->toucher.dmgFlags & (DMG_UNKNOWN_1 | DMG_MAGIC_ICE | DMG_MAGIC_FIRE))) {
-            actor->freezeTimer = elem->acHitElem->toucher.damage;
+                   (elem->acHitElem->atDmgInfo.dmgFlags & (DMG_UNKNOWN_1 | DMG_MAGIC_ICE | DMG_MAGIC_FIRE))) {
+            actor->freezeTimer = elem->acHitElem->atDmgInfo.damage;
             flag = 0x00;
-        } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_FIRE) {
+        } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_FIRE) {
             flag = 0x01;
-        } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_ICE) {
+        } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_ICE) {
             flag = 0x02;
-        } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_UNK1) {
+        } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_UNK1) {
             flag = 0x04;
-        } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_UNK2) {
+        } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_UNK2) {
             flag = 0x08;
-        } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_UNK3) {
+        } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_UNK3) {
             flag = 0x10;
-        } else if (elem->acHitElem->toucher.dmgFlags & DMG_ARROW_LIGHT) {
+        } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_LIGHT) {
             flag = 0x20;
-        } else if (elem->acHitElem->toucher.dmgFlags & DMG_MAGIC_LIGHT) {
+        } else if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_MAGIC_LIGHT) {
             if (freezeFlag) {
-                actor->freezeTimer = elem->acHitElem->toucher.damage;
+                actor->freezeTimer = elem->acHitElem->atDmgInfo.damage;
             }
             flag = 0x40;
         } else {
diff --git a/src/code/z_collision_check.c b/src/code/z_collision_check.c
index 57510f3c48..14822cf1cd 100644
--- a/src/code/z_collision_check.c
+++ b/src/code/z_collision_check.c
@@ -139,18 +139,19 @@ void Collider_ResetOCBase(PlayState* play, Collider* col) {
     col->ocFlags2 &= ~OC2_HIT_PLAYER;
 }
 
-s32 Collider_InitElementTouch(PlayState* play, ColliderElementTouch* touch) {
-    static ColliderElementTouch init = { 0x00000000, 0, 0 };
+s32 Collider_InitElementDamageInfoAT(PlayState* play, ColliderElementDamageInfoAT* atDmgInfo) {
+    static ColliderElementDamageInfoAT init = { 0x00000000, 0, 0 };
 
-    *touch = init;
+    *atDmgInfo = init;
     return true;
 }
 
-s32 Collider_DestroyElementTouch(PlayState* play, ColliderElementTouch* touch) {
+s32 Collider_DestroyElementDamageInfoAT(PlayState* play, ColliderElementDamageInfoAT* atDmgInfo) {
     return true;
 }
 
-s32 Collider_SetElementTouch(PlayState* play, ColliderElementTouch* dest, ColliderElementTouch* src) {
+s32 Collider_SetElementDamageInfoAT(PlayState* play, ColliderElementDamageInfoAT* dest,
+                                    ColliderElementDamageInfoAT* src) {
     dest->dmgFlags = src->dmgFlags;
     dest->effect = src->effect;
     dest->damage = src->damage;
@@ -160,51 +161,52 @@ s32 Collider_SetElementTouch(PlayState* play, ColliderElementTouch* dest, Collid
 void Collider_ResetATElement_Unk(PlayState* play, ColliderElement* elem) {
 }
 
-s32 Collider_InitElementBump(PlayState* play, ColliderElementBump* bump) {
-    static ColliderElementBump init = { 0xFFCFFFFF, 0, 0, { 0, 0, 0 } };
+s32 Collider_InitElementDamageInfoAC(PlayState* play, ColliderElementDamageInfoAC* acDmgInfo) {
+    static ColliderElementDamageInfoAC init = { 0xFFCFFFFF, 0, 0, { 0, 0, 0 } };
 
-    *bump = init;
+    *acDmgInfo = init;
     return true;
 }
 
-s32 Collider_DestroyElementBump(PlayState* play, ColliderElementBump* bump) {
+s32 Collider_DestroyElementDamageInfoAC(PlayState* play, ColliderElementDamageInfoAC* acDmgInfo) {
     return true;
 }
 
-s32 Collider_SetElementBump(PlayState* play, ColliderElementBump* bump, ColliderElementBumpInit* init) {
-    bump->dmgFlags = init->dmgFlags;
-    bump->effect = init->effect;
-    bump->defense = init->defense;
+s32 Collider_SetElementDamageInfoAC(PlayState* play, ColliderElementDamageInfoAC* acDmgInfo,
+                                    ColliderElementDamageInfoACInit* init) {
+    acDmgInfo->dmgFlags = init->dmgFlags;
+    acDmgInfo->effect = init->effect;
+    acDmgInfo->defense = init->defense;
     return true;
 }
 
 s32 Collider_InitElement(PlayState* play, ColliderElement* elem) {
     static ColliderElement init = {
         { 0, 0, 0 },   { 0xFFCFFFFF, 0, 0, { 0, 0, 0 } },
-        ELEMTYPE_UNK0, TOUCH_NONE,
-        BUMP_NONE,     OCELEM_NONE,
+        ELEMTYPE_UNK0, ATELEM_NONE,
+        ACELEM_NONE,   OCELEM_NONE,
         NULL,          NULL,
         NULL,          NULL,
     };
 
     *elem = init;
-    Collider_InitElementTouch(play, &elem->toucher);
-    Collider_InitElementBump(play, &elem->bumper);
+    Collider_InitElementDamageInfoAT(play, &elem->atDmgInfo);
+    Collider_InitElementDamageInfoAC(play, &elem->acDmgInfo);
     return true;
 }
 
 s32 Collider_DestroyElement(PlayState* play, ColliderElement* elem) {
-    Collider_DestroyElementTouch(play, &elem->toucher);
-    Collider_DestroyElementBump(play, &elem->bumper);
+    Collider_DestroyElementDamageInfoAT(play, &elem->atDmgInfo);
+    Collider_DestroyElementDamageInfoAC(play, &elem->acDmgInfo);
     return true;
 }
 
 s32 Collider_SetElement(PlayState* play, ColliderElement* elem, ColliderElementInit* elemInit) {
     elem->elemType = elemInit->elemType;
-    Collider_SetElementTouch(play, &elem->toucher, &elemInit->toucher);
-    Collider_SetElementBump(play, &elem->bumper, &elemInit->bumper);
-    elem->toucherFlags = elemInit->toucherFlags;
-    elem->bumperFlags = elemInit->bumperFlags;
+    Collider_SetElementDamageInfoAT(play, &elem->atDmgInfo, &elemInit->atDmgInfo);
+    Collider_SetElementDamageInfoAC(play, &elem->acDmgInfo, &elemInit->acDmgInfo);
+    elem->atElemFlags = elemInit->atElemFlags;
+    elem->acElemFlags = elemInit->acElemFlags;
     elem->ocElemFlags = elemInit->ocElemFlags;
     return true;
 }
@@ -212,15 +214,15 @@ s32 Collider_SetElement(PlayState* play, ColliderElement* elem, ColliderElementI
 void Collider_ResetATElement(PlayState* play, ColliderElement* elem) {
     elem->atHit = NULL;
     elem->atHitElem = NULL;
-    elem->toucherFlags &= ~TOUCH_HIT;
-    elem->toucherFlags &= ~TOUCH_DREW_HITMARK;
+    elem->atElemFlags &= ~ATELEM_HIT;
+    elem->atElemFlags &= ~ATELEM_DREW_HITMARK;
     Collider_ResetATElement_Unk(play, elem);
 }
 
 void Collider_ResetACElement(PlayState* play, ColliderElement* elem) {
-    elem->bumper.hitPos.x = elem->bumper.hitPos.y = elem->bumper.hitPos.z = 0;
-    elem->bumperFlags &= ~BUMP_HIT;
-    elem->bumperFlags &= ~BUMP_DRAW_HITMARK;
+    elem->acDmgInfo.hitPos.x = elem->acDmgInfo.hitPos.y = elem->acDmgInfo.hitPos.z = 0;
+    elem->acElemFlags &= ~ACELEM_HIT;
+    elem->acElemFlags &= ~ACELEM_DRAW_HITMARK;
     elem->acHit = NULL;
     elem->acHitElem = NULL;
 }
@@ -929,7 +931,7 @@ s32 Collider_QuadSetNearestAC(PlayState* play, ColliderQuad* quad, Vec3f* hitPos
     f32 acDistSq;
     Vec3f dcMid;
 
-    if (!(quad->elem.toucherFlags & TOUCH_NEAREST)) {
+    if (!(quad->elem.atElemFlags & ATELEM_NEAREST)) {
         return true;
     }
     Math_Vec3s_ToVec3f(&dcMid, &quad->dim.dcMid);
@@ -1366,21 +1368,15 @@ s32 CollisionCheck_SetOCLine(PlayState* play, CollisionCheckContext* colChkCtx,
     return index;
 }
 
-/**
- * Skips AT elements that are off.
- */
-s32 CollisionCheck_SkipElementTouch(ColliderElement* elem) {
-    if (!(elem->toucherFlags & TOUCH_ON)) {
+s32 CollisionCheck_IsElementNotAT(ColliderElement* elem) {
+    if (!(elem->atElemFlags & ATELEM_ON)) {
         return true;
     }
     return false;
 }
 
-/**
- * Skips AC elements that are off.
- */
-s32 CollisionCheck_SkipElementBump(ColliderElement* elem) {
-    if (!(elem->bumperFlags & BUMP_ON)) {
+s32 CollisionCheck_IsElementNotAC(ColliderElement* elem) {
+    if (!(elem->acElemFlags & ACELEM_ON)) {
         return true;
     }
     return false;
@@ -1390,7 +1386,7 @@ s32 CollisionCheck_SkipElementBump(ColliderElement* elem) {
  * If the AT element has no dmgFlags in common with the AC element, no collision happens.
  */
 s32 CollisionCheck_NoSharedFlags(ColliderElement* atElem, ColliderElement* acElem) {
-    if (!(atElem->toucher.dmgFlags & acElem->bumper.dmgFlags)) {
+    if (!(atElem->atDmgInfo.dmgFlags & acElem->acDmgInfo.dmgFlags)) {
         return true;
     }
     return false;
@@ -1538,9 +1534,9 @@ void CollisionCheck_RedBloodUnused(PlayState* play, Collider* collider, Vec3f* v
  * Plays sound effects and displays hitmarks for solid-type AC colliders (METAL, WOOD, HARD, and TREE)
  */
 void CollisionCheck_HitSolid(PlayState* play, ColliderElement* elem, Collider* collider, Vec3f* hitPos) {
-    s32 flags = elem->toucherFlags & TOUCH_SFX_MASK;
+    s32 flags = elem->atElemFlags & ATELEM_SFX_MASK;
 
-    if (flags == TOUCH_SFX_NORMAL && collider->colType != COLTYPE_METAL) {
+    if (flags == ATELEM_SFX_NORMAL && collider->colType != COLTYPE_METAL) {
         EffectSsHitMark_SpawnFixedScale(play, EFFECT_HITMARK_WHITE, hitPos);
         if (collider->actor == NULL) {
             Audio_PlaySfxGeneral(NA_SE_IT_SHIELD_BOUND, &gSfxDefaultPos, 4, &gSfxDefaultFreqAndVolScale,
@@ -1549,14 +1545,14 @@ void CollisionCheck_HitSolid(PlayState* play, ColliderElement* elem, Collider* c
             Audio_PlaySfxGeneral(NA_SE_IT_SHIELD_BOUND, &collider->actor->projectedPos, 4, &gSfxDefaultFreqAndVolScale,
                                  &gSfxDefaultFreqAndVolScale, &gSfxDefaultReverb);
         }
-    } else if (flags == TOUCH_SFX_NORMAL) { // collider->colType == COLTYPE_METAL
+    } else if (flags == ATELEM_SFX_NORMAL) { // collider->colType == COLTYPE_METAL
         EffectSsHitMark_SpawnFixedScale(play, EFFECT_HITMARK_METAL, hitPos);
         if (collider->actor == NULL) {
             CollisionCheck_SpawnShieldParticlesMetal(play, hitPos);
         } else {
             CollisionCheck_SpawnShieldParticlesMetalSfx(play, hitPos, &collider->actor->projectedPos);
         }
-    } else if (flags == TOUCH_SFX_HARD) {
+    } else if (flags == ATELEM_SFX_HARD) {
         EffectSsHitMark_SpawnFixedScale(play, EFFECT_HITMARK_WHITE, hitPos);
         if (collider->actor == NULL) {
             Audio_PlaySfxGeneral(NA_SE_IT_SHIELD_BOUND, &gSfxDefaultPos, 4, &gSfxDefaultFreqAndVolScale,
@@ -1565,7 +1561,7 @@ void CollisionCheck_HitSolid(PlayState* play, ColliderElement* elem, Collider* c
             Audio_PlaySfxGeneral(NA_SE_IT_SHIELD_BOUND, &collider->actor->projectedPos, 4, &gSfxDefaultFreqAndVolScale,
                                  &gSfxDefaultFreqAndVolScale, &gSfxDefaultReverb);
         }
-    } else if (flags == TOUCH_SFX_WOOD) {
+    } else if (flags == ATELEM_SFX_WOOD) {
         EffectSsHitMark_SpawnFixedScale(play, EFFECT_HITMARK_DUST, hitPos);
         if (collider->actor == NULL) {
             Audio_PlaySfxGeneral(NA_SE_IT_REFLECTION_WOOD, &gSfxDefaultPos, 4, &gSfxDefaultFreqAndVolScale,
@@ -1655,10 +1651,10 @@ static HitInfo sHitInfo[] = {
  */
 void CollisionCheck_HitEffects(PlayState* play, Collider* atCol, ColliderElement* atElem, Collider* acCol,
                                ColliderElement* acElem, Vec3f* hitPos) {
-    if (acElem->bumperFlags & BUMP_NO_HITMARK) {
+    if (acElem->acElemFlags & ACELEM_NO_HITMARK) {
         return;
     }
-    if (!(atElem->toucherFlags & TOUCH_AT_HITMARK) && atElem->toucherFlags & TOUCH_DREW_HITMARK) {
+    if (!(atElem->atElemFlags & ATELEM_AT_HITMARK) && atElem->atElemFlags & ATELEM_DREW_HITMARK) {
         return;
     }
     if (acCol->actor != NULL) {
@@ -1677,7 +1673,7 @@ void CollisionCheck_HitEffects(PlayState* play, Collider* atCol, ColliderElement
             }
         } else if (sHitInfo[acCol->colType].effect != HIT_NONE) {
             EffectSsHitMark_SpawnFixedScale(play, sHitInfo[acCol->colType].effect, hitPos);
-            if (!(acElem->bumperFlags & BUMP_NO_SWORD_SFX)) {
+            if (!(acElem->acElemFlags & ACELEM_NO_SWORD_SFX)) {
                 CollisionCheck_SwordHitAudio(atCol, acElem);
             }
         }
@@ -1709,33 +1705,33 @@ s32 CollisionCheck_SetATvsAC(PlayState* play, Collider* atCol, ColliderElement*
     if (acCol->acFlags & AC_HARD && atCol->actor != NULL && acCol->actor != NULL) {
         CollisionCheck_SetBounce(atCol, acCol);
     }
-    if (!(acElem->bumperFlags & BUMP_NO_AT_INFO)) {
+    if (!(acElem->acElemFlags & ACELEM_NO_AT_INFO)) {
         atCol->atFlags |= AT_HIT;
         atCol->at = acCol->actor;
         atElem->atHit = acCol;
         atElem->atHitElem = acElem;
-        atElem->toucherFlags |= TOUCH_HIT;
+        atElem->atElemFlags |= ATELEM_HIT;
         if (atCol->actor != NULL) {
-            atCol->actor->colChkInfo.atHitEffect = acElem->bumper.effect;
+            atCol->actor->colChkInfo.atHitEffect = acElem->acDmgInfo.effect;
         }
     }
     acCol->acFlags |= AC_HIT;
     acCol->ac = atCol->actor;
     acElem->acHit = atCol;
     acElem->acHitElem = atElem;
-    acElem->bumperFlags |= BUMP_HIT;
+    acElem->acElemFlags |= ACELEM_HIT;
     if (acCol->actor != NULL) {
-        acCol->actor->colChkInfo.acHitEffect = atElem->toucher.effect;
+        acCol->actor->colChkInfo.acHitEffect = atElem->atDmgInfo.effect;
     }
-    acElem->bumper.hitPos.x = hitPos->x;
-    acElem->bumper.hitPos.y = hitPos->y;
-    acElem->bumper.hitPos.z = hitPos->z;
-    if (!(atElem->toucherFlags & TOUCH_AT_HITMARK) && acCol->colType != COLTYPE_METAL &&
+    acElem->acDmgInfo.hitPos.x = hitPos->x;
+    acElem->acDmgInfo.hitPos.y = hitPos->y;
+    acElem->acDmgInfo.hitPos.z = hitPos->z;
+    if (!(atElem->atElemFlags & ATELEM_AT_HITMARK) && acCol->colType != COLTYPE_METAL &&
         acCol->colType != COLTYPE_WOOD && acCol->colType != COLTYPE_HARD) {
-        acElem->bumperFlags |= BUMP_DRAW_HITMARK;
+        acElem->acElemFlags |= ACELEM_DRAW_HITMARK;
     } else {
         CollisionCheck_HitEffects(play, atCol, atElem, acCol, acElem, hitPos);
-        atElem->toucherFlags |= TOUCH_DREW_HITMARK;
+        atElem->atElemFlags |= ATELEM_DREW_HITMARK;
     }
     return true;
 }
@@ -1751,12 +1747,12 @@ void CollisionCheck_ATJntSphVsACJntSph(PlayState* play, CollisionCheckContext* c
 
     if (atJntSph->count > 0 && atJntSph->elements != NULL && acJntSph->count > 0 && acJntSph->elements != NULL) {
         for (atJntSphElem = atJntSph->elements; atJntSphElem < atJntSph->elements + atJntSph->count; atJntSphElem++) {
-            if (CollisionCheck_SkipElementTouch(&atJntSphElem->base) == true) {
+            if (CollisionCheck_IsElementNotAT(&atJntSphElem->base) == true) {
                 continue;
             }
             for (acJntSphElem = acJntSph->elements; acJntSphElem < acJntSph->elements + acJntSph->count;
                  acJntSphElem++) {
-                if (CollisionCheck_SkipElementBump(&acJntSphElem->base) == true) {
+                if (CollisionCheck_IsElementNotAC(&acJntSphElem->base) == true) {
                     continue;
                 }
                 if (CollisionCheck_NoSharedFlags(&atJntSphElem->base, &acJntSphElem->base) == true) {
@@ -1803,11 +1799,11 @@ void CollisionCheck_ATJntSphVsACCyl(PlayState* play, CollisionCheckContext* colC
     f32 centerDist;
 
     if (atJntSph->count > 0 && atJntSph->elements != NULL && acCyl->dim.radius > 0 && acCyl->dim.height > 0) {
-        if (CollisionCheck_SkipElementBump(&acCyl->elem) == true) {
+        if (CollisionCheck_IsElementNotAC(&acCyl->elem) == true) {
             return;
         }
         for (atJntSphElem = atJntSph->elements; atJntSphElem < atJntSph->elements + atJntSph->count; atJntSphElem++) {
-            if (CollisionCheck_SkipElementTouch(&atJntSphElem->base) == true) {
+            if (CollisionCheck_IsElementNotAT(&atJntSphElem->base) == true) {
                 continue;
             }
             if (CollisionCheck_NoSharedFlags(&atJntSphElem->base, &acCyl->elem) == true) {
@@ -1855,11 +1851,11 @@ void CollisionCheck_ATCylVsACJntSph(PlayState* play, CollisionCheckContext* colC
     ColliderJntSphElement* acJntSphElem;
 
     if (acJntSph->count > 0 && acJntSph->elements != NULL && atCyl->dim.radius > 0 && atCyl->dim.height > 0) {
-        if (CollisionCheck_SkipElementTouch(&atCyl->elem) == true) {
+        if (CollisionCheck_IsElementNotAT(&atCyl->elem) == true) {
             return;
         }
         for (acJntSphElem = acJntSph->elements; acJntSphElem < acJntSph->elements + acJntSph->count; acJntSphElem++) {
-            if (CollisionCheck_SkipElementBump(&acJntSphElem->base) == true) {
+            if (CollisionCheck_IsElementNotAC(&acJntSphElem->base) == true) {
                 continue;
             }
             if (CollisionCheck_NoSharedFlags(&atCyl->elem, &acJntSphElem->base) == true) {
@@ -1910,11 +1906,11 @@ void CollisionCheck_ATJntSphVsACTris(PlayState* play, CollisionCheckContext* col
 
     if (atJntSph->count > 0 && atJntSph->elements != NULL && acTris->count > 0 && acTris->elements != NULL) {
         for (atJntSphElem = atJntSph->elements; atJntSphElem < atJntSph->elements + atJntSph->count; atJntSphElem++) {
-            if (CollisionCheck_SkipElementTouch(&atJntSphElem->base) == true) {
+            if (CollisionCheck_IsElementNotAT(&atJntSphElem->base) == true) {
                 continue;
             }
             for (acTrisElem = acTris->elements; acTrisElem < acTris->elements + acTris->count; acTrisElem++) {
-                if (CollisionCheck_SkipElementBump(&acTrisElem->base) == true) {
+                if (CollisionCheck_IsElementNotAC(&acTrisElem->base) == true) {
                     continue;
                 }
                 if (CollisionCheck_NoSharedFlags(&atJntSphElem->base, &acTrisElem->base) == true) {
@@ -1952,11 +1948,11 @@ void CollisionCheck_ATTrisVsACJntSph(PlayState* play, CollisionCheckContext* col
 
     if (acJntSph->count > 0 && acJntSph->elements != NULL && atTris->count > 0 && atTris->elements != NULL) {
         for (acJntSphElem = acJntSph->elements; acJntSphElem < acJntSph->elements + acJntSph->count; acJntSphElem++) {
-            if (CollisionCheck_SkipElementBump(&acJntSphElem->base) == true) {
+            if (CollisionCheck_IsElementNotAC(&acJntSphElem->base) == true) {
                 continue;
             }
             for (atTrisElem = atTris->elements; atTrisElem < atTris->elements + atTris->count; atTrisElem++) {
-                if (CollisionCheck_SkipElementTouch(&atTrisElem->base) == true) {
+                if (CollisionCheck_IsElementNotAT(&atTrisElem->base) == true) {
                     continue;
                 }
                 if (CollisionCheck_NoSharedFlags(&atTrisElem->base, &acJntSphElem->base) == true) {
@@ -1994,13 +1990,13 @@ void CollisionCheck_ATJntSphVsACQuad(PlayState* play, CollisionCheckContext* col
     ColliderJntSphElement* atJntSphElem;
 
     if (atJntSph->count > 0 && atJntSph->elements != NULL) {
-        if (CollisionCheck_SkipElementBump(&acQuad->elem) == true) {
+        if (CollisionCheck_IsElementNotAC(&acQuad->elem) == true) {
             return;
         }
         Math3D_TriNorm(&tri1, &acQuad->dim.quad[2], &acQuad->dim.quad[3], &acQuad->dim.quad[1]);
         Math3D_TriNorm(&tri2, &acQuad->dim.quad[1], &acQuad->dim.quad[0], &acQuad->dim.quad[2]);
         for (atJntSphElem = atJntSph->elements; atJntSphElem < atJntSph->elements + atJntSph->count; atJntSphElem++) {
-            if (CollisionCheck_SkipElementTouch(&atJntSphElem->base) == true) {
+            if (CollisionCheck_IsElementNotAT(&atJntSphElem->base) == true) {
                 continue;
             }
             if (CollisionCheck_NoSharedFlags(&atJntSphElem->base, &acQuad->elem) == true) {
@@ -2041,13 +2037,13 @@ void CollisionCheck_ATQuadVsACJntSph(PlayState* play, CollisionCheckContext* col
     ColliderJntSphElement* acJntSphElem;
 
     if (acJntSph->count > 0 && acJntSph->elements != NULL) {
-        if (CollisionCheck_SkipElementTouch(&atQuad->elem) == true) {
+        if (CollisionCheck_IsElementNotAT(&atQuad->elem) == true) {
             return;
         }
         Math3D_TriNorm(&tri1, &atQuad->dim.quad[2], &atQuad->dim.quad[3], &atQuad->dim.quad[1]);
         Math3D_TriNorm(&tri2, &atQuad->dim.quad[2], &atQuad->dim.quad[1], &atQuad->dim.quad[0]);
         for (acJntSphElem = acJntSph->elements; acJntSphElem < acJntSph->elements + acJntSph->count; acJntSphElem++) {
-            if (CollisionCheck_SkipElementBump(&acJntSphElem->base) == true) {
+            if (CollisionCheck_IsElementNotAC(&acJntSphElem->base) == true) {
                 continue;
             }
             if (CollisionCheck_NoSharedFlags(&atQuad->elem, &acJntSphElem->base) == true) {
@@ -2091,10 +2087,10 @@ void CollisionCheck_ATCylVsACCyl(PlayState* play, CollisionCheckContext* colChkC
     Vec3f hitPos;
 
     if (atCyl->dim.radius > 0 && atCyl->dim.height > 0 && acCyl->dim.radius > 0 && acCyl->dim.height > 0) {
-        if (CollisionCheck_SkipElementBump(&acCyl->elem) == true) {
+        if (CollisionCheck_IsElementNotAC(&acCyl->elem) == true) {
             return;
         }
-        if (CollisionCheck_SkipElementTouch(&atCyl->elem) == true) {
+        if (CollisionCheck_IsElementNotAT(&atCyl->elem) == true) {
             return;
         }
         if (CollisionCheck_NoSharedFlags(&atCyl->elem, &acCyl->elem) == true) {
@@ -2128,11 +2124,11 @@ void CollisionCheck_ATCylVsACTris(PlayState* play, CollisionCheckContext* colChk
     Vec3f hitPos;
 
     if (atCyl->dim.radius > 0 && atCyl->dim.height > 0 && acTris->count > 0 && acTris->elements != NULL) {
-        if (CollisionCheck_SkipElementTouch(&atCyl->elem) == true) {
+        if (CollisionCheck_IsElementNotAT(&atCyl->elem) == true) {
             return;
         }
         for (acTrisElem = acTris->elements; acTrisElem < acTris->elements + acTris->count; acTrisElem++) {
-            if (CollisionCheck_SkipElementBump(&acTrisElem->base) == true) {
+            if (CollisionCheck_IsElementNotAC(&acTrisElem->base) == true) {
                 continue;
             }
             if (CollisionCheck_NoSharedFlags(&atCyl->elem, &acTrisElem->base) == true) {
@@ -2162,11 +2158,11 @@ void CollisionCheck_ATTrisVsACCyl(PlayState* play, CollisionCheckContext* colChk
     ColliderCylinder* acCyl = (ColliderCylinder*)acCol;
 
     if (acCyl->dim.radius > 0 && acCyl->dim.height > 0 && atTris->count > 0 && atTris->elements != NULL) {
-        if (CollisionCheck_SkipElementBump(&acCyl->elem) == true) {
+        if (CollisionCheck_IsElementNotAC(&acCyl->elem) == true) {
             return;
         }
         for (atTrisElem = atTris->elements; atTrisElem < atTris->elements + atTris->count; atTrisElem++) {
-            if (CollisionCheck_SkipElementTouch(&atTrisElem->base) == true) {
+            if (CollisionCheck_IsElementNotAT(&atTrisElem->base) == true) {
                 continue;
             }
             if (CollisionCheck_NoSharedFlags(&atTrisElem->base, &acCyl->elem) == true) {
@@ -2197,8 +2193,8 @@ void CollisionCheck_ATCylVsACQuad(PlayState* play, CollisionCheckContext* colChk
     ColliderQuad* acQuad = (ColliderQuad*)acCol;
 
     if (atCyl->dim.height > 0 && atCyl->dim.radius > 0) {
-        if (CollisionCheck_SkipElementTouch(&atCyl->elem) == true ||
-            CollisionCheck_SkipElementBump(&acQuad->elem) == true) {
+        if (CollisionCheck_IsElementNotAT(&atCyl->elem) == true ||
+            CollisionCheck_IsElementNotAC(&acQuad->elem) == true) {
             return;
         }
         if (CollisionCheck_NoSharedFlags(&atCyl->elem, &acQuad->elem) == true) {
@@ -2253,8 +2249,8 @@ void CollisionCheck_ATQuadVsACCyl(PlayState* play, CollisionCheckContext* colChk
     ColliderCylinder* acCyl = (ColliderCylinder*)acCol;
 
     if (acCyl->dim.height > 0 && acCyl->dim.radius > 0) {
-        if (CollisionCheck_SkipElementBump(&acCyl->elem) == true ||
-            CollisionCheck_SkipElementTouch(&atQuad->elem) == true) {
+        if (CollisionCheck_IsElementNotAC(&acCyl->elem) == true ||
+            CollisionCheck_IsElementNotAT(&atQuad->elem) == true) {
             return;
         }
         if (CollisionCheck_NoSharedFlags(&atQuad->elem, &acCyl->elem) == true) {
@@ -2319,11 +2315,11 @@ void CollisionCheck_ATTrisVsACTris(PlayState* play, CollisionCheckContext* colCh
 
     if (acTris->count > 0 && acTris->elements != NULL && atTris->count > 0 && atTris->elements != NULL) {
         for (acTrisElem = acTris->elements; acTrisElem < acTris->elements + acTris->count; acTrisElem++) {
-            if (CollisionCheck_SkipElementBump(&acTrisElem->base) == true) {
+            if (CollisionCheck_IsElementNotAC(&acTrisElem->base) == true) {
                 continue;
             }
             for (atTrisElem = atTris->elements; atTrisElem < atTris->elements + atTris->count; atTrisElem++) {
-                if (CollisionCheck_SkipElementTouch(&atTrisElem->base) == true) {
+                if (CollisionCheck_IsElementNotAT(&atTrisElem->base) == true) {
                     continue;
                 }
                 if (CollisionCheck_NoSharedFlags(&atTrisElem->base, &acTrisElem->base) == true) {
@@ -2369,13 +2365,13 @@ void CollisionCheck_ATTrisVsACQuad(PlayState* play, CollisionCheckContext* colCh
     ColliderQuad* acQuad = (ColliderQuad*)acCol;
 
     if (atTris->count > 0 && atTris->elements != NULL) {
-        if (CollisionCheck_SkipElementBump(&acQuad->elem) == true) {
+        if (CollisionCheck_IsElementNotAC(&acQuad->elem) == true) {
             return;
         }
         Math3D_TriNorm(&tri1, &acQuad->dim.quad[2], &acQuad->dim.quad[3], &acQuad->dim.quad[1]);
         Math3D_TriNorm(&tri2, &acQuad->dim.quad[1], &acQuad->dim.quad[0], &acQuad->dim.quad[2]);
         for (atTrisElem = atTris->elements; atTrisElem < atTris->elements + atTris->count; atTrisElem++) {
-            if (CollisionCheck_SkipElementTouch(&atTrisElem->base) == true) {
+            if (CollisionCheck_IsElementNotAT(&atTrisElem->base) == true) {
                 continue;
             }
             if (CollisionCheck_NoSharedFlags(&atTrisElem->base, &acQuad->elem) == true) {
@@ -2416,13 +2412,13 @@ void CollisionCheck_ATQuadVsACTris(PlayState* play, CollisionCheckContext* colCh
     ColliderTrisElement* acTrisElem;
 
     if (acTris->count > 0 && acTris->elements != NULL) {
-        if (CollisionCheck_SkipElementTouch(&atQuad->elem) == true) {
+        if (CollisionCheck_IsElementNotAT(&atQuad->elem) == true) {
             return;
         }
         Math3D_TriNorm(&tri1, &atQuad->dim.quad[2], &atQuad->dim.quad[3], &atQuad->dim.quad[1]);
         Math3D_TriNorm(&tri2, &atQuad->dim.quad[1], &atQuad->dim.quad[0], &atQuad->dim.quad[2]);
         for (acTrisElem = acTris->elements; acTrisElem < acTris->elements + acTris->count; acTrisElem++) {
-            if (CollisionCheck_SkipElementBump(&acTrisElem->base) == true) {
+            if (CollisionCheck_IsElementNotAC(&acTrisElem->base) == true) {
                 continue;
             }
             if (CollisionCheck_NoSharedFlags(&atQuad->elem, &acTrisElem->base) == true) {
@@ -2468,10 +2464,10 @@ void CollisionCheck_ATQuadVsACQuad(PlayState* play, CollisionCheckContext* colCh
     s32 i;
     s32 j;
 
-    if (CollisionCheck_SkipElementTouch(&atQuad->elem) == true) {
+    if (CollisionCheck_IsElementNotAT(&atQuad->elem) == true) {
         return;
     }
-    if (CollisionCheck_SkipElementBump(&acQuad->elem) == true) {
+    if (CollisionCheck_IsElementNotAC(&acQuad->elem) == true) {
         return;
     }
     if (CollisionCheck_NoSharedFlags(&atQuad->elem, &acQuad->elem) == true) {
@@ -2522,14 +2518,14 @@ void CollisionCheck_SetJntSphHitFX(PlayState* play, CollisionCheckContext* colCh
     ColliderJntSphElement* jntSphElem;
 
     for (jntSphElem = jntSph->elements; jntSphElem < jntSph->elements + jntSph->count; jntSphElem++) {
-        if ((jntSphElem->base.bumperFlags & BUMP_DRAW_HITMARK) && (jntSphElem->base.acHitElem != NULL) &&
-            !(jntSphElem->base.acHitElem->toucherFlags & TOUCH_DREW_HITMARK)) {
+        if ((jntSphElem->base.acElemFlags & ACELEM_DRAW_HITMARK) && (jntSphElem->base.acHitElem != NULL) &&
+            !(jntSphElem->base.acHitElem->atElemFlags & ATELEM_DREW_HITMARK)) {
             Vec3f hitPos;
 
-            Math_Vec3s_ToVec3f(&hitPos, &jntSphElem->base.bumper.hitPos);
+            Math_Vec3s_ToVec3f(&hitPos, &jntSphElem->base.acDmgInfo.hitPos);
             CollisionCheck_HitEffects(play, jntSphElem->base.acHit, jntSphElem->base.acHitElem, &jntSph->base,
                                       &jntSphElem->base, &hitPos);
-            jntSphElem->base.acHitElem->toucherFlags |= TOUCH_DREW_HITMARK;
+            jntSphElem->base.acHitElem->atElemFlags |= ATELEM_DREW_HITMARK;
             return;
         }
     }
@@ -2538,13 +2534,13 @@ void CollisionCheck_SetJntSphHitFX(PlayState* play, CollisionCheckContext* colCh
 void CollisionCheck_SetCylHitFX(PlayState* play, CollisionCheckContext* colChkCtx, Collider* col) {
     ColliderCylinder* cyl = (ColliderCylinder*)col;
 
-    if ((cyl->elem.bumperFlags & BUMP_DRAW_HITMARK) && (cyl->elem.acHitElem != NULL) &&
-        !(cyl->elem.acHitElem->toucherFlags & TOUCH_DREW_HITMARK)) {
+    if ((cyl->elem.acElemFlags & ACELEM_DRAW_HITMARK) && (cyl->elem.acHitElem != NULL) &&
+        !(cyl->elem.acHitElem->atElemFlags & ATELEM_DREW_HITMARK)) {
         Vec3f hitPos;
 
-        Math_Vec3s_ToVec3f(&hitPos, &cyl->elem.bumper.hitPos);
+        Math_Vec3s_ToVec3f(&hitPos, &cyl->elem.acDmgInfo.hitPos);
         CollisionCheck_HitEffects(play, cyl->elem.acHit, cyl->elem.acHitElem, &cyl->base, &cyl->elem, &hitPos);
-        cyl->elem.acHitElem->toucherFlags |= TOUCH_DREW_HITMARK;
+        cyl->elem.acHitElem->atElemFlags |= ATELEM_DREW_HITMARK;
     }
 }
 
@@ -2553,14 +2549,14 @@ void CollisionCheck_SetTrisHitFX(PlayState* play, CollisionCheckContext* colChkC
     ColliderTrisElement* trisElem;
 
     for (trisElem = tris->elements; trisElem < tris->elements + tris->count; trisElem++) {
-        if ((trisElem->base.bumperFlags & BUMP_DRAW_HITMARK) && (trisElem->base.acHitElem != NULL) &&
-            !(trisElem->base.acHitElem->toucherFlags & TOUCH_DREW_HITMARK)) {
+        if ((trisElem->base.acElemFlags & ACELEM_DRAW_HITMARK) && (trisElem->base.acHitElem != NULL) &&
+            !(trisElem->base.acHitElem->atElemFlags & ATELEM_DREW_HITMARK)) {
             Vec3f hitPos;
 
-            Math_Vec3s_ToVec3f(&hitPos, &trisElem->base.bumper.hitPos);
+            Math_Vec3s_ToVec3f(&hitPos, &trisElem->base.acDmgInfo.hitPos);
             CollisionCheck_HitEffects(play, trisElem->base.acHit, trisElem->base.acHitElem, &tris->base,
                                       &trisElem->base, &hitPos);
-            trisElem->base.acHitElem->toucherFlags |= TOUCH_DREW_HITMARK;
+            trisElem->base.acHitElem->atElemFlags |= ATELEM_DREW_HITMARK;
             return;
         }
     }
@@ -2570,11 +2566,11 @@ void CollisionCheck_SetQuadHitFX(PlayState* play, CollisionCheckContext* colChkC
     ColliderQuad* quad = (ColliderQuad*)col;
     Vec3f hitPos;
 
-    if ((quad->elem.bumperFlags & BUMP_DRAW_HITMARK) && (quad->elem.acHitElem != NULL) &&
-        !(quad->elem.acHitElem->toucherFlags & TOUCH_DREW_HITMARK)) {
-        Math_Vec3s_ToVec3f(&hitPos, &quad->elem.bumper.hitPos);
+    if ((quad->elem.acElemFlags & ACELEM_DRAW_HITMARK) && (quad->elem.acHitElem != NULL) &&
+        !(quad->elem.acHitElem->atElemFlags & ATELEM_DREW_HITMARK)) {
+        Math_Vec3s_ToVec3f(&hitPos, &quad->elem.acDmgInfo.hitPos);
         CollisionCheck_HitEffects(play, quad->elem.acHit, quad->elem.acHitElem, &quad->base, &quad->elem, &hitPos);
-        quad->elem.acHitElem->toucherFlags |= TOUCH_DREW_HITMARK;
+        quad->elem.acHitElem->atElemFlags |= ATELEM_DREW_HITMARK;
     }
 }
 
@@ -2661,7 +2657,7 @@ void CollisionCheck_AC(PlayState* play, CollisionCheckContext* colChkCtx, Collid
  * Iterates through all AT colliders, testing them for AC collisions with each AC collider, setting the info regarding
  * the collision for each AC and AT collider that collided. Then spawns hitmarks and plays sound effects for each
  * successful collision. To collide, an AT collider must share a type (AC_TYPE_PLAYER, AC_TYPE_ENEMY, or AC_TYPE_OTHER)
- * with the AC collider and the toucher and bumper elements that overlapped must share a dmgFlag.
+ * with the AC collider and the AT and AC elements that overlapped must share a dmgFlag.
  */
 void CollisionCheck_AT(PlayState* play, CollisionCheckContext* colChkCtx) {
     Collider** atColP;
@@ -3052,20 +3048,20 @@ void CollisionCheck_ApplyDamage(PlayState* play, CollisionCheckContext* colChkCt
     if (col->actor == NULL || !(col->acFlags & AC_HIT)) {
         return;
     }
-    if (!(elem->bumperFlags & BUMP_HIT) || elem->bumperFlags & BUMP_NO_DAMAGE) {
+    if (!(elem->acElemFlags & ACELEM_HIT) || elem->acElemFlags & ACELEM_NO_DAMAGE) {
         return;
     }
 
     ASSERT(elem->acHitElem != NULL, "pclobj_elem->ac_hit_elem != NULL", "../z_collision_check.c", 6493);
     tbl = col->actor->colChkInfo.damageTable;
     if (tbl == NULL) {
-        damage = (f32)elem->acHitElem->toucher.damage - elem->bumper.defense;
+        damage = (f32)elem->acHitElem->atDmgInfo.damage - elem->acDmgInfo.defense;
         if (damage < 0) {
             damage = 0;
         }
     } else {
         s32 i;
-        u32 flags = elem->acHitElem->toucher.dmgFlags;
+        u32 flags = elem->acHitElem->atDmgInfo.dmgFlags;
 
         for (i = 0; i < 32; i++, flags >>= 1) {
             if (flags == 1) {
diff --git a/src/code/z_en_a_keep.c b/src/code/z_en_a_keep.c
index 33adc258c9..21c5ebd757 100644
--- a/src/code/z_en_a_keep.c
+++ b/src/code/z_en_a_keep.c
@@ -45,8 +45,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK2,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 25, 60, 0, { 0, 0, 0 } },
diff --git a/src/code/z_en_item00.c b/src/code/z_en_item00.c
index 23bc99f828..9e2e762498 100644
--- a/src/code/z_en_item00.c
+++ b/src/code/z_en_item00.c
@@ -45,8 +45,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000010, 0x00, 0x00 },
-        TOUCH_NONE | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_NONE | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 10, 30, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Arms_Hook/z_arms_hook.c b/src/overlays/actors/ovl_Arms_Hook/z_arms_hook.c
index d085142969..9552c45460 100644
--- a/src/overlays/actors/ovl_Arms_Hook/z_arms_hook.c
+++ b/src/overlays/actors/ovl_Arms_Hook/z_arms_hook.c
@@ -36,8 +36,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK2,
         { 0x00000080, 0x00, 0x01 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_NEAREST | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_NEAREST | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -154,7 +154,7 @@ void ArmsHook_Shoot(ArmsHook* this, PlayState* play) {
         Actor* touchedActor = this->collider.base.at;
 
         if ((touchedActor->update != NULL) && (touchedActor->flags & (ACTOR_FLAG_9 | ACTOR_FLAG_10))) {
-            if (this->collider.elem.atHitElem->bumperFlags & BUMP_HOOKABLE) {
+            if (this->collider.elem.atHitElem->acElemFlags & ACELEM_HOOKABLE) {
                 ArmsHook_AttachHookToActor(this, touchedActor);
                 if (CHECK_FLAG_ALL(touchedActor->flags, ACTOR_FLAG_10)) {
                     func_80865044(this);
diff --git a/src/overlays/actors/ovl_Bg_Bdan_Objects/z_bg_bdan_objects.c b/src/overlays/actors/ovl_Bg_Bdan_Objects/z_bg_bdan_objects.c
index d263d8bce4..bd1270ab2f 100644
--- a/src/overlays/actors/ovl_Bg_Bdan_Objects/z_bg_bdan_objects.c
+++ b/src/overlays/actors/ovl_Bg_Bdan_Objects/z_bg_bdan_objects.c
@@ -68,8 +68,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x04 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_HARD,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_HARD,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { 0x00BB, 0x0050, 0x0000, { 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Bdan_Switch/z_bg_bdan_switch.c b/src/overlays/actors/ovl_Bg_Bdan_Switch/z_bg_bdan_switch.c
index d754036fb5..cba055ea84 100644
--- a/src/overlays/actors/ovl_Bg_Bdan_Switch/z_bg_bdan_switch.c
+++ b/src/overlays/actors/ovl_Bg_Bdan_Switch/z_bg_bdan_switch.c
@@ -60,8 +60,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xEFC1FFFE, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 120, 0 }, 370 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Bombwall/z_bg_bombwall.c b/src/overlays/actors/ovl_Bg_Bombwall/z_bg_bombwall.c
index 3d12a423bc..ff7ebd99c2 100644
--- a/src/overlays/actors/ovl_Bg_Bombwall/z_bg_bombwall.c
+++ b/src/overlays/actors/ovl_Bg_Bombwall/z_bg_bombwall.c
@@ -26,8 +26,8 @@ static ColliderTrisElementInit sTrisElementsInit[3] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x40000048, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { -70.0f, 176.0f, 0.0f }, { -70.0f, -4.0f, 0.0f }, { 0.0f, -4.0f, 30.0f } } },
@@ -37,8 +37,8 @@ static ColliderTrisElementInit sTrisElementsInit[3] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x40000048, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 70.0f, 176.0f, 0.0f }, { -70.0f, 176.0f, 0.0f }, { 0.0f, -4.0f, 30.0f } } },
@@ -48,8 +48,8 @@ static ColliderTrisElementInit sTrisElementsInit[3] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x40000048, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 70.0f, -4.0f, 0.0f }, { 70.0f, 176.0f, 0.0f }, { 0.0f, -4.0f, 30.0f } } },
diff --git a/src/overlays/actors/ovl_Bg_Breakwall/z_bg_breakwall.c b/src/overlays/actors/ovl_Bg_Breakwall/z_bg_breakwall.c
index 522a139eed..ef92c82eec 100644
--- a/src/overlays/actors/ovl_Bg_Breakwall/z_bg_breakwall.c
+++ b/src/overlays/actors/ovl_Bg_Breakwall/z_bg_breakwall.c
@@ -51,8 +51,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK0,
         { 0x00000048, 0x00, 0x00 },
         { 0x00000048, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_Bg_Ddan_Kd/z_bg_ddan_kd.c b/src/overlays/actors/ovl_Bg_Ddan_Kd/z_bg_ddan_kd.c
index f5cc8bd9c5..f5396acc28 100644
--- a/src/overlays/actors/ovl_Bg_Ddan_Kd/z_bg_ddan_kd.c
+++ b/src/overlays/actors/ovl_Bg_Ddan_Kd/z_bg_ddan_kd.c
@@ -43,8 +43,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK2,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 245, 180, -400, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Dodoago/z_bg_dodoago.c b/src/overlays/actors/ovl_Bg_Dodoago/z_bg_dodoago.c
index dc28fe90ef..d1ccf08fc0 100644
--- a/src/overlays/actors/ovl_Bg_Dodoago/z_bg_dodoago.c
+++ b/src/overlays/actors/ovl_Bg_Dodoago/z_bg_dodoago.c
@@ -45,8 +45,8 @@ static ColliderCylinderInit sColCylinderInitMain = {
         ELEMTYPE_UNK2,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 80, 30, 80, { 0, 0, 0 } },
@@ -65,8 +65,8 @@ static ColliderCylinderInit sColCylinderInitLeftRight = {
         ELEMTYPE_UNK2,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 50, 60, 280, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Gnd_Soulmeiro/z_bg_gnd_soulmeiro.c b/src/overlays/actors/ovl_Bg_Gnd_Soulmeiro/z_bg_gnd_soulmeiro.c
index e717fcc356..05cf7cde56 100644
--- a/src/overlays/actors/ovl_Bg_Gnd_Soulmeiro/z_bg_gnd_soulmeiro.c
+++ b/src/overlays/actors/ovl_Bg_Gnd_Soulmeiro/z_bg_gnd_soulmeiro.c
@@ -44,8 +44,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x00 },
         { 0x00020800, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 50, 20, 20, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Haka_Sgami/z_bg_haka_sgami.c b/src/overlays/actors/ovl_Bg_Haka_Sgami/z_bg_haka_sgami.c
index 6a1963aeab..c96055ac4a 100644
--- a/src/overlays/actors/ovl_Bg_Haka_Sgami/z_bg_haka_sgami.c
+++ b/src/overlays/actors/ovl_Bg_Haka_Sgami/z_bg_haka_sgami.c
@@ -44,8 +44,8 @@ static ColliderTrisElementInit sTrisElementsInit[4] = {
             ELEMTYPE_UNK2,
             { 0x20000000, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { { { 365.0f, 45.0f, 27.0f }, { 130.0f, 45.0f, 150.0f }, { 290.0f, 45.0f, 145.0f } } },
@@ -55,8 +55,8 @@ static ColliderTrisElementInit sTrisElementsInit[4] = {
             ELEMTYPE_UNK2,
             { 0x20000000, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { { { 250.0f, 45.0f, 90.0f }, { 50.0f, 45.0f, 80.0f }, { 160.0f, 45.0f, 160.0f } } },
@@ -66,8 +66,8 @@ static ColliderTrisElementInit sTrisElementsInit[4] = {
             ELEMTYPE_UNK2,
             { 0x20000000, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { { { -305.0f, 33.0f, -7.0f }, { -220.0f, 33.0f, 40.0f }, { -130.0f, 33.0f, -5.0f } } },
@@ -77,8 +77,8 @@ static ColliderTrisElementInit sTrisElementsInit[4] = {
             ELEMTYPE_UNK2,
             { 0x20000000, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { { { -190.0f, 33.0f, 40.0f }, { -30.0f, 33.0f, 15.0f }, { -70.0f, 33.0f, -30.0f } } },
@@ -111,8 +111,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 80, 130, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Haka_Trap/z_bg_haka_trap.c b/src/overlays/actors/ovl_Bg_Haka_Trap/z_bg_haka_trap.c
index 5c0a4fc067..c65a1a2f0a 100644
--- a/src/overlays/actors/ovl_Bg_Haka_Trap/z_bg_haka_trap.c
+++ b/src/overlays/actors/ovl_Bg_Haka_Trap/z_bg_haka_trap.c
@@ -54,8 +54,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x04 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 90, 0, { 0, 0, 0 } },
@@ -67,8 +67,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00020000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 1800.0f, 1200.0f, 0.0f }, { -1800.0f, 1200.0f, 0.0f }, { -1800.0f, 0.0f, 0.0f } } },
@@ -78,8 +78,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00020000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 1800.0f, 1200.0f, 0.0f }, { -1800.0f, 0.0f, 0.0f }, { 1800.0f, 0.0f, 0.0f } } },
@@ -166,8 +166,8 @@ void BgHakaTrap_Init(Actor* thisx, PlayState* play) {
                 this->colliderCylinder.dim.radius = 18;
                 this->colliderCylinder.dim.height = 115;
 
-                this->colliderCylinder.elem.toucherFlags &= ~TOUCH_SFX_NORMAL;
-                this->colliderCylinder.elem.toucherFlags |= TOUCH_SFX_WOOD;
+                this->colliderCylinder.elem.atElemFlags &= ~ATELEM_SFX_NORMAL;
+                this->colliderCylinder.elem.atElemFlags |= ATELEM_SFX_WOOD;
 
                 this->actionFunc = func_808801B8;
             }
diff --git a/src/overlays/actors/ovl_Bg_Haka_Tubo/z_bg_haka_tubo.c b/src/overlays/actors/ovl_Bg_Haka_Tubo/z_bg_haka_tubo.c
index fbc49da85c..c499e31915 100644
--- a/src/overlays/actors/ovl_Bg_Haka_Tubo/z_bg_haka_tubo.c
+++ b/src/overlays/actors/ovl_Bg_Haka_Tubo/z_bg_haka_tubo.c
@@ -43,8 +43,8 @@ static ColliderCylinderInit sPotColliderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000008, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 25, 60, 30, { 0, 0, 0 } },
@@ -63,8 +63,8 @@ static ColliderCylinderInit sFlamesColliderInit = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x01, 0x04 },
         { 0x00000008, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 60, 45, 235, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Haka_Zou/z_bg_haka_zou.c b/src/overlays/actors/ovl_Bg_Haka_Zou/z_bg_haka_zou.c
index cab46b4461..781dd579b4 100644
--- a/src/overlays/actors/ovl_Bg_Haka_Zou/z_bg_haka_zou.c
+++ b/src/overlays/actors/ovl_Bg_Haka_Zou/z_bg_haka_zou.c
@@ -45,8 +45,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000008, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 5, 60, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Curtain/z_bg_hidan_curtain.c b/src/overlays/actors/ovl_Bg_Hidan_Curtain/z_bg_hidan_curtain.c
index 536a8abcdd..394a828b61 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Curtain/z_bg_hidan_curtain.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Curtain/z_bg_hidan_curtain.c
@@ -42,8 +42,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x01, 0x04 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 81, 144, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Dalm/z_bg_hidan_dalm.c b/src/overlays/actors/ovl_Bg_Hidan_Dalm/z_bg_hidan_dalm.c
index 5d91381a97..16e1d80423 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Dalm/z_bg_hidan_dalm.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Dalm/z_bg_hidan_dalm.c
@@ -35,8 +35,8 @@ static ColliderTrisElementInit sTrisElementInit[4] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000040, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_NO_AT_INFO | BUMP_NO_DAMAGE | BUMP_NO_SWORD_SFX | BUMP_NO_HITMARK,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_NO_AT_INFO | ACELEM_NO_DAMAGE | ACELEM_NO_SWORD_SFX | ACELEM_NO_HITMARK,
             OCELEM_NONE,
         },
         { { { 305.0f, 0.0f, -300.0f }, { 305.0f, 600.0f, -300.0f }, { 305.0f, 600.0f, 300.0f } } },
@@ -46,8 +46,8 @@ static ColliderTrisElementInit sTrisElementInit[4] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000040, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_NO_AT_INFO | BUMP_NO_DAMAGE | BUMP_NO_SWORD_SFX | BUMP_NO_HITMARK,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_NO_AT_INFO | ACELEM_NO_DAMAGE | ACELEM_NO_SWORD_SFX | ACELEM_NO_HITMARK,
             OCELEM_NONE,
         },
         { { { 305.0f, 0.0f, -300.0f }, { 305.0f, 600.0f, 300.0f }, { 305.0f, 0.0f, 300.0f } } },
@@ -57,8 +57,8 @@ static ColliderTrisElementInit sTrisElementInit[4] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000040, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_NO_AT_INFO | BUMP_NO_DAMAGE | BUMP_NO_SWORD_SFX | BUMP_NO_HITMARK,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_NO_AT_INFO | ACELEM_NO_DAMAGE | ACELEM_NO_SWORD_SFX | ACELEM_NO_HITMARK,
             OCELEM_NONE,
         },
         { { { -305.0f, 0.0f, -300.0f }, { -305.0f, 600.0f, 300.0f }, { -305.0f, 600.0f, -300.0f } } },
@@ -68,8 +68,8 @@ static ColliderTrisElementInit sTrisElementInit[4] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000040, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_NO_AT_INFO | BUMP_NO_DAMAGE | BUMP_NO_SWORD_SFX | BUMP_NO_HITMARK,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_NO_AT_INFO | ACELEM_NO_DAMAGE | ACELEM_NO_SWORD_SFX | ACELEM_NO_HITMARK,
             OCELEM_NONE,
         },
         { { { -305.0f, 0.0f, -300.0f }, { -305.0f, 0.0f, 300.0f }, { -305.0f, 600.0f, 300.0f } } },
@@ -129,8 +129,8 @@ void BgHidanDalm_Wait(BgHidanDalm* this, PlayState* play) {
         (player->meleeWeaponAnimation == PLAYER_MWA_HAMMER_FORWARD ||
          player->meleeWeaponAnimation == PLAYER_MWA_HAMMER_SIDE)) {
         this->collider.base.acFlags &= ~AC_HIT;
-        if ((this->collider.elements[0].base.bumperFlags & BUMP_HIT) ||
-            (this->collider.elements[1].base.bumperFlags & BUMP_HIT)) {
+        if ((this->collider.elements[0].base.acElemFlags & ACELEM_HIT) ||
+            (this->collider.elements[1].base.acElemFlags & ACELEM_HIT)) {
             this->dyna.actor.world.rot.y -= 0x4000;
         } else {
             this->dyna.actor.world.rot.y += 0x4000;
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Firewall/z_bg_hidan_firewall.c b/src/overlays/actors/ovl_Bg_Hidan_Firewall/z_bg_hidan_firewall.c
index 52f904432f..130b38c124 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Firewall/z_bg_hidan_firewall.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Firewall/z_bg_hidan_firewall.c
@@ -46,8 +46,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x01, 0x04 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 30, 83, 0, { 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Fwbig/z_bg_hidan_fwbig.c b/src/overlays/actors/ovl_Bg_Hidan_Fwbig/z_bg_hidan_fwbig.c
index 8f55a52102..170f0677ba 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Fwbig/z_bg_hidan_fwbig.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Fwbig/z_bg_hidan_fwbig.c
@@ -56,8 +56,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x01, 0x04 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 30, 130, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Hamstep/z_bg_hidan_hamstep.c b/src/overlays/actors/ovl_Bg_Hidan_Hamstep/z_bg_hidan_hamstep.c
index cc078dc8bf..27c1c9e617 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Hamstep/z_bg_hidan_hamstep.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Hamstep/z_bg_hidan_hamstep.c
@@ -31,8 +31,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x40000040, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { -20.0f, 3.0f, -20.0f }, { -20.0f, 3.0f, 20.0f }, { 20.0f, 3.0f, 20.0f } } },
@@ -42,8 +42,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x40000040, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 20.0f, 3.0f, 20.0f }, { 20.0f, 3.0f, -20.0f }, { -20.0f, 3.0f, -20.0f } } },
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Hrock/z_bg_hidan_hrock.c b/src/overlays/actors/ovl_Bg_Hidan_Hrock/z_bg_hidan_hrock.c
index ce8149375f..d2f5a4f8c6 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Hrock/z_bg_hidan_hrock.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Hrock/z_bg_hidan_hrock.c
@@ -36,8 +36,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x40000040, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_NO_AT_INFO | BUMP_NO_DAMAGE | BUMP_NO_SWORD_SFX | BUMP_NO_HITMARK,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_NO_AT_INFO | ACELEM_NO_DAMAGE | ACELEM_NO_SWORD_SFX | ACELEM_NO_HITMARK,
             OCELEM_NONE,
         },
         { { { -40.0f, 3.0f, -40.0f }, { -40.0f, 3.0f, 40.0f }, { 40.0f, 3.0f, 40.0f } } },
@@ -47,8 +47,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x40000040, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_NO_AT_INFO | BUMP_NO_DAMAGE | BUMP_NO_SWORD_SFX | BUMP_NO_HITMARK,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_NO_AT_INFO | ACELEM_NO_DAMAGE | ACELEM_NO_SWORD_SFX | ACELEM_NO_HITMARK,
             OCELEM_NONE,
         },
         { { { 40.0f, 3.0f, 40.0f }, { 40.0f, 3.0f, -40.0f }, { -40.0f, 3.0f, -40.0f } } },
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Kowarerukabe/z_bg_hidan_kowarerukabe.c b/src/overlays/actors/ovl_Bg_Hidan_Kowarerukabe/z_bg_hidan_kowarerukabe.c
index 5c5730585e..d9ce7e6ab2 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Kowarerukabe/z_bg_hidan_kowarerukabe.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Kowarerukabe/z_bg_hidan_kowarerukabe.c
@@ -46,8 +46,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 100 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Rock/z_bg_hidan_rock.c b/src/overlays/actors/ovl_Bg_Hidan_Rock/z_bg_hidan_rock.c
index 45863efc2e..ef6bb43867 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Rock/z_bg_hidan_rock.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Rock/z_bg_hidan_rock.c
@@ -54,8 +54,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x01, 0x04 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { 45, 77, -40, { 3310, 120, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Rsekizou/z_bg_hidan_rsekizou.c b/src/overlays/actors/ovl_Bg_Hidan_Rsekizou/z_bg_hidan_rsekizou.c
index 1ebe33fcf1..5f8ec0ce03 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Rsekizou/z_bg_hidan_rsekizou.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Rsekizou/z_bg_hidan_rsekizou.c
@@ -32,8 +32,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 1, { { 0, 30, 40 }, 25 }, 100 },
@@ -43,8 +43,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 1, { { -35, 32, 77 }, 32 }, 100 },
@@ -54,8 +54,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 1, { { -80, 35, 130 }, 42 }, 100 },
@@ -65,8 +65,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 1, { { 0, 30, -40 }, 25 }, 100 },
@@ -76,8 +76,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 1, { { 35, 32, -77 }, 32 }, 100 },
@@ -87,8 +87,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 1, { { 80, 35, -130 }, 42 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Sekizou/z_bg_hidan_sekizou.c b/src/overlays/actors/ovl_Bg_Hidan_Sekizou/z_bg_hidan_sekizou.c
index 9cba8f54de..d07db7eca0 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Sekizou/z_bg_hidan_sekizou.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Sekizou/z_bg_hidan_sekizou.c
@@ -35,8 +35,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 1, { { 0, 30, 40 }, 23 }, 100 },
@@ -46,8 +46,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 1, { { 0, 32, 87 }, 30 }, 100 },
@@ -57,8 +57,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 1, { { 0, 35, 150 }, 40 }, 100 },
@@ -68,8 +68,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 1, { { 0, 30, 40 }, 23 }, 100 },
@@ -79,8 +79,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 1, { { 0, 32, 87 }, 30 }, 100 },
@@ -90,8 +90,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 1, { { 0, 35, 150 }, 40 }, 100 },
@@ -140,7 +140,7 @@ void func_8088CEC0(BgHidanSekizou* this, s32 arg1, s16 arg2) {
         element->dim.worldSphere.center.y = (s16)this->dyna.actor.home.pos.y + element->dim.modelSphere.center.y;
         element->dim.worldSphere.center.z = this->dyna.actor.home.pos.z - (sp30 * element->dim.modelSphere.center.x) +
                                             (sp2C * element->dim.modelSphere.center.z);
-        element->base.toucherFlags |= TOUCH_ON;
+        element->base.atElemFlags |= ATELEM_ON;
         element->base.ocElemFlags |= OCELEM_ON;
     }
 }
@@ -211,7 +211,7 @@ void func_8088D434(BgHidanSekizou* this, PlayState* play) {
         }
     }
     for (i = 3 * phi_s4; i < ARRAY_COUNT(this->elements); i++) {
-        this->collider.elements[i].base.toucherFlags &= ~TOUCH_ON;
+        this->collider.elements[i].base.atElemFlags &= ~ATELEM_ON;
         this->collider.elements[i].base.ocElemFlags &= ~OCELEM_ON;
     }
 }
diff --git a/src/overlays/actors/ovl_Bg_Hidan_Sima/z_bg_hidan_sima.c b/src/overlays/actors/ovl_Bg_Hidan_Sima/z_bg_hidan_sima.c
index 56363ffef7..8273e2696b 100644
--- a/src/overlays/actors/ovl_Bg_Hidan_Sima/z_bg_hidan_sima.c
+++ b/src/overlays/actors/ovl_Bg_Hidan_Sima/z_bg_hidan_sima.c
@@ -39,8 +39,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 1, { { 0, 40, 100 }, 22 }, 100 },
@@ -50,8 +50,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x01, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 1, { { 0, 40, 145 }, 30 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Ice_Shelter/z_bg_ice_shelter.c b/src/overlays/actors/ovl_Bg_Ice_Shelter/z_bg_ice_shelter.c
index a3c81e8292..459e118992 100644
--- a/src/overlays/actors/ovl_Bg_Ice_Shelter/z_bg_ice_shelter.c
+++ b/src/overlays/actors/ovl_Bg_Ice_Shelter/z_bg_ice_shelter.c
@@ -53,8 +53,8 @@ static ColliderCylinderInit sCylinderInit1 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 0, 0, 0, { 0, 0, 0 } },
@@ -73,8 +73,8 @@ static ColliderCylinderInit sCylinderInit2 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x4FC1FFF6, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 0, 0, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Ice_Turara/z_bg_ice_turara.c b/src/overlays/actors/ovl_Bg_Ice_Turara/z_bg_ice_turara.c
index a69d5ecee7..30a2c281c8 100644
--- a/src/overlays/actors/ovl_Bg_Ice_Turara/z_bg_ice_turara.c
+++ b/src/overlays/actors/ovl_Bg_Ice_Turara/z_bg_ice_turara.c
@@ -33,8 +33,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x04 },
         { 0x4FC007CA, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 13, 120, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Jya_1flift/z_bg_jya_1flift.c b/src/overlays/actors/ovl_Bg_Jya_1flift/z_bg_jya_1flift.c
index fa7d9a9dc5..0b5e2c538c 100644
--- a/src/overlays/actors/ovl_Bg_Jya_1flift/z_bg_jya_1flift.c
+++ b/src/overlays/actors/ovl_Bg_Jya_1flift/z_bg_jya_1flift.c
@@ -50,8 +50,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 70, 80, -82, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Jya_Bombchuiwa/z_bg_jya_bombchuiwa.c b/src/overlays/actors/ovl_Bg_Jya_Bombchuiwa/z_bg_jya_bombchuiwa.c
index 54cb236fe2..b4c2d6158b 100644
--- a/src/overlays/actors/ovl_Bg_Jya_Bombchuiwa/z_bg_jya_bombchuiwa.c
+++ b/src/overlays/actors/ovl_Bg_Jya_Bombchuiwa/z_bg_jya_bombchuiwa.c
@@ -32,8 +32,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { -300, 0, 0 }, 40 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Jya_Bombiwa/z_bg_jya_bombiwa.c b/src/overlays/actors/ovl_Bg_Jya_Bombiwa/z_bg_jya_bombiwa.c
index c8dfb31195..4450298fa3 100644
--- a/src/overlays/actors/ovl_Bg_Jya_Bombiwa/z_bg_jya_bombiwa.c
+++ b/src/overlays/actors/ovl_Bg_Jya_Bombiwa/z_bg_jya_bombiwa.c
@@ -34,8 +34,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 50 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Jya_Goroiwa/z_bg_jya_goroiwa.c b/src/overlays/actors/ovl_Bg_Jya_Goroiwa/z_bg_jya_goroiwa.c
index 6fe12df585..7ab065bd3e 100644
--- a/src/overlays/actors/ovl_Bg_Jya_Goroiwa/z_bg_jya_goroiwa.c
+++ b/src/overlays/actors/ovl_Bg_Jya_Goroiwa/z_bg_jya_goroiwa.c
@@ -41,8 +41,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 58 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Jya_Haheniron/z_bg_jya_haheniron.c b/src/overlays/actors/ovl_Bg_Jya_Haheniron/z_bg_jya_haheniron.c
index a46f78272d..93e972e2e6 100644
--- a/src/overlays/actors/ovl_Bg_Jya_Haheniron/z_bg_jya_haheniron.c
+++ b/src/overlays/actors/ovl_Bg_Jya_Haheniron/z_bg_jya_haheniron.c
@@ -40,8 +40,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 10 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Jya_Ironobj/z_bg_jya_ironobj.c b/src/overlays/actors/ovl_Bg_Jya_Ironobj/z_bg_jya_ironobj.c
index 6ef2ddd84c..9188456de5 100644
--- a/src/overlays/actors/ovl_Bg_Jya_Ironobj/z_bg_jya_ironobj.c
+++ b/src/overlays/actors/ovl_Bg_Jya_Ironobj/z_bg_jya_ironobj.c
@@ -51,8 +51,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 30, 150, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Jya_Megami/z_bg_jya_megami.c b/src/overlays/actors/ovl_Bg_Jya_Megami/z_bg_jya_megami.c
index 4acd8fbf03..f4bd5ebcff 100644
--- a/src/overlays/actors/ovl_Bg_Jya_Megami/z_bg_jya_megami.c
+++ b/src/overlays/actors/ovl_Bg_Jya_Megami/z_bg_jya_megami.c
@@ -38,8 +38,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00200000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { 0, -600, -200 }, 60 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Menkuri_Eye/z_bg_menkuri_eye.c b/src/overlays/actors/ovl_Bg_Menkuri_Eye/z_bg_menkuri_eye.c
index a52473acab..a39b2e8aed 100644
--- a/src/overlays/actors/ovl_Bg_Menkuri_Eye/z_bg_menkuri_eye.c
+++ b/src/overlays/actors/ovl_Bg_Menkuri_Eye/z_bg_menkuri_eye.c
@@ -34,8 +34,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK4,
             { 0x00000000, 0x00, 0x00 },
             { 0x0001F820, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 1, { { 0, 0, 0 }, 14 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Mizu_Bwall/z_bg_mizu_bwall.c b/src/overlays/actors/ovl_Bg_Mizu_Bwall/z_bg_mizu_bwall.c
index f829706fc5..2eaf22b9ec 100644
--- a/src/overlays/actors/ovl_Bg_Mizu_Bwall/z_bg_mizu_bwall.c
+++ b/src/overlays/actors/ovl_Bg_Mizu_Bwall/z_bg_mizu_bwall.c
@@ -37,8 +37,8 @@ static ColliderTrisElementInit sTrisElementInitFloor[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { -40.0f, 0.0f, -40.0f }, { -40.0f, 0.0f, 40.0f }, { 40.0f, 0.0f, 40.0f } } },
@@ -48,8 +48,8 @@ static ColliderTrisElementInit sTrisElementInitFloor[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { -40.0f, 0.0f, -40.0f }, { 40.0f, 0.0f, 40.0f }, { 40.0f, 0.0f, -40.0f } } },
@@ -75,8 +75,8 @@ static ColliderTrisElementInit sTrisElementInitRutoWall[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 0.0f, 116.0f, 0.0f }, { 0.0f, 0.0f, 70.0f }, { 0.0f, 0.0f, -70.0f } } },
@@ -102,8 +102,8 @@ static ColliderTrisElementInit sTrisElementInitWall[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 0.0f, 120.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 60.0f, 0.0f, 0.0f } } },
@@ -113,8 +113,8 @@ static ColliderTrisElementInit sTrisElementInitWall[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 0.0f, 120.0f, 0.0f }, { 60.0f, 0.0f, 0.0f }, { 60.0f, 120.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_Bg_Mori_Hashigo/z_bg_mori_hashigo.c b/src/overlays/actors/ovl_Bg_Mori_Hashigo/z_bg_mori_hashigo.c
index a31345545c..a4b870c10b 100644
--- a/src/overlays/actors/ovl_Bg_Mori_Hashigo/z_bg_mori_hashigo.c
+++ b/src/overlays/actors/ovl_Bg_Mori_Hashigo/z_bg_mori_hashigo.c
@@ -42,8 +42,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK4,
             { 0x00000000, 0x00, 0x00 },
             { 0x0001F820, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 25 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Po_Event/z_bg_po_event.c b/src/overlays/actors/ovl_Bg_Po_Event/z_bg_po_event.c
index 51a3faed85..f5fb613bab 100644
--- a/src/overlays/actors/ovl_Bg_Po_Event/z_bg_po_event.c
+++ b/src/overlays/actors/ovl_Bg_Po_Event/z_bg_po_event.c
@@ -46,8 +46,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK4,
             { 0x00000000, 0x00, 0x00 },
             { 0x0001F820, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 25.0f, 33.0f, 0.0f }, { -25.0f, 33.0f, 0.0f }, { -25.0f, -33.0f, 0.0f } } },
@@ -57,8 +57,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK4,
             { 0x00000000, 0x00, 0x00 },
             { 0x0001F820, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 25.0f, 33.0f, 0.0f }, { -25.0f, -33.0f, 0.0f }, { 25.0f, -33.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_Bg_Po_Syokudai/z_bg_po_syokudai.c b/src/overlays/actors/ovl_Bg_Po_Syokudai/z_bg_po_syokudai.c
index 4008fe167e..5c379a538c 100644
--- a/src/overlays/actors/ovl_Bg_Po_Syokudai/z_bg_po_syokudai.c
+++ b/src/overlays/actors/ovl_Bg_Po_Syokudai/z_bg_po_syokudai.c
@@ -37,8 +37,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 12, 60, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Spot06_Objects/z_bg_spot06_objects.c b/src/overlays/actors/ovl_Bg_Spot06_Objects/z_bg_spot06_objects.c
index 1729cc935c..5b183b9724 100644
--- a/src/overlays/actors/ovl_Bg_Spot06_Objects/z_bg_spot06_objects.c
+++ b/src/overlays/actors/ovl_Bg_Spot06_Objects/z_bg_spot06_objects.c
@@ -62,8 +62,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000080, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE,
             OCELEM_ON,
         },
         { 1, { { 0, 0, -160 }, 18 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Spot08_Bakudankabe/z_bg_spot08_bakudankabe.c b/src/overlays/actors/ovl_Bg_Spot08_Bakudankabe/z_bg_spot08_bakudankabe.c
index 17cdba2f1a..3015e90151 100644
--- a/src/overlays/actors/ovl_Bg_Spot08_Bakudankabe/z_bg_spot08_bakudankabe.c
+++ b/src/overlays/actors/ovl_Bg_Spot08_Bakudankabe/z_bg_spot08_bakudankabe.c
@@ -37,8 +37,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { 0, 50, 50 }, 70 }, 100 },
@@ -48,8 +48,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { -100, 50, 50 }, 70 }, 100 },
@@ -59,8 +59,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { 100, 50, 50 }, 70 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Spot11_Bakudankabe/z_bg_spot11_bakudankabe.c b/src/overlays/actors/ovl_Bg_Spot11_Bakudankabe/z_bg_spot11_bakudankabe.c
index 590ac93890..68f723fcec 100644
--- a/src/overlays/actors/ovl_Bg_Spot11_Bakudankabe/z_bg_spot11_bakudankabe.c
+++ b/src/overlays/actors/ovl_Bg_Spot11_Bakudankabe/z_bg_spot11_bakudankabe.c
@@ -41,8 +41,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000008, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 40, 80, 0, { 2259, 108, -1580 } },
diff --git a/src/overlays/actors/ovl_Bg_Spot16_Bombstone/z_bg_spot16_bombstone.c b/src/overlays/actors/ovl_Bg_Spot16_Bombstone/z_bg_spot16_bombstone.c
index c147daa300..5a9726a82e 100644
--- a/src/overlays/actors/ovl_Bg_Spot16_Bombstone/z_bg_spot16_bombstone.c
+++ b/src/overlays/actors/ovl_Bg_Spot16_Bombstone/z_bg_spot16_bombstone.c
@@ -39,8 +39,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x4FC1FFF6, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 50, 0 }, 288 }, 100 },
@@ -73,8 +73,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000008, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 190, 80, 0, { 10, 0, 50 } },
diff --git a/src/overlays/actors/ovl_Bg_Spot18_Basket/z_bg_spot18_basket.c b/src/overlays/actors/ovl_Bg_Spot18_Basket/z_bg_spot18_basket.c
index 6eae47eb98..92d1f9671a 100644
--- a/src/overlays/actors/ovl_Bg_Spot18_Basket/z_bg_spot18_basket.c
+++ b/src/overlays/actors/ovl_Bg_Spot18_Basket/z_bg_spot18_basket.c
@@ -40,8 +40,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 2040, 0 }, 54 }, 100 },
@@ -51,8 +51,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 1, { { 0, 1400, 0 }, 13 }, 100 },
diff --git a/src/overlays/actors/ovl_Bg_Toki_Swd/z_bg_toki_swd.c b/src/overlays/actors/ovl_Bg_Toki_Swd/z_bg_toki_swd.c
index ce21d366ae..3f8968a84c 100644
--- a/src/overlays/actors/ovl_Bg_Toki_Swd/z_bg_toki_swd.c
+++ b/src/overlays/actors/ovl_Bg_Toki_Swd/z_bg_toki_swd.c
@@ -47,8 +47,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 10, 70, 0, { 0 } },
diff --git a/src/overlays/actors/ovl_Bg_Ydan_Maruta/z_bg_ydan_maruta.c b/src/overlays/actors/ovl_Bg_Ydan_Maruta/z_bg_ydan_maruta.c
index 5a5e654cfd..9d141c2975 100644
--- a/src/overlays/actors/ovl_Bg_Ydan_Maruta/z_bg_ydan_maruta.c
+++ b/src/overlays/actors/ovl_Bg_Ydan_Maruta/z_bg_ydan_maruta.c
@@ -38,8 +38,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x00, 0x04 },
             { 0x00000004, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_WOOD,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_WOOD,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 220.0f, -10.0f, 0.0f }, { 220.0f, 10.0f, 0.0f }, { -220.0f, 10.0f, 0.0f } } },
@@ -49,8 +49,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x00, 0x04 },
             { 0x00000004, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_WOOD,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_WOOD,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 16.0f, 0.0f, 0.0f }, { 16.0f, 135.0f, 0.0f }, { -16.0f, 135.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_Bg_Ydan_Sp/z_bg_ydan_sp.c b/src/overlays/actors/ovl_Bg_Ydan_Sp/z_bg_ydan_sp.c
index 5441cae92f..1a5d2e3664 100644
--- a/src/overlays/actors/ovl_Bg_Ydan_Sp/z_bg_ydan_sp.c
+++ b/src/overlays/actors/ovl_Bg_Ydan_Sp/z_bg_ydan_sp.c
@@ -42,8 +42,8 @@ static ColliderTrisElementInit sTrisItemsInit[2] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x00 },
             { 0x00020800, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 75.0f, -8.0f, 75.0f }, { -75.0f, -8.0f, 75.0f }, { -75.0f, -8.0f, -75.0f } } },
@@ -53,8 +53,8 @@ static ColliderTrisElementInit sTrisItemsInit[2] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x00 },
             { 0x00020800, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 140.0f, 288.8f, 0.0f }, { -140.0f, 288.0f, 0.0f }, { -140.0f, 0.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_Boss_Dodongo/z_boss_dodongo.c b/src/overlays/actors/ovl_Boss_Dodongo/z_boss_dodongo.c
index 518e51cb15..a502fb6f2e 100644
--- a/src/overlays/actors/ovl_Boss_Dodongo/z_boss_dodongo.c
+++ b/src/overlays/actors/ovl_Boss_Dodongo/z_boss_dodongo.c
@@ -1239,12 +1239,12 @@ void BossDodongo_UpdateDamage(BossDodongo* this, PlayState* play) {
     if (this->unk_1C0 == 0) {
         if (this->actionFunc == BossDodongo_Inhale) {
             for (i = 0; i < 19; i++) {
-                if (this->collider.elements[i].base.bumperFlags & BUMP_HIT) {
+                if (this->collider.elements[i].base.acElemFlags & ACELEM_HIT) {
                     acHitElem = this->collider.elements[i].base.acHitElem;
 
-                    if ((acHitElem->toucher.dmgFlags & DMG_BOOMERANG) ||
-                        (acHitElem->toucher.dmgFlags & DMG_SLINGSHOT)) {
-                        this->collider.elements[i].base.bumperFlags &= ~BUMP_HIT;
+                    if ((acHitElem->atDmgInfo.dmgFlags & DMG_BOOMERANG) ||
+                        (acHitElem->atDmgInfo.dmgFlags & DMG_SLINGSHOT)) {
+                        this->collider.elements[i].base.acElemFlags &= ~ACELEM_HIT;
                         this->unk_1C0 = 2;
                         BossDodongo_SetupWalk(this);
                         this->unk_1DA = 0x32;
@@ -1254,11 +1254,11 @@ void BossDodongo_UpdateDamage(BossDodongo* this, PlayState* play) {
             }
         }
 
-        if (this->collider.elements[0].base.bumperFlags & BUMP_HIT) {
-            this->collider.elements[0].base.bumperFlags &= ~BUMP_HIT;
+        if (this->collider.elements[0].base.acElemFlags & ACELEM_HIT) {
+            this->collider.elements[0].base.acElemFlags &= ~ACELEM_HIT;
             acHitElem = this->collider.elements[0].base.acHitElem;
             if ((this->actionFunc == BossDodongo_Vulnerable) || (this->actionFunc == BossDodongo_LayDown)) {
-                swordDamage = damage = CollisionCheck_GetSwordDamage(acHitElem->toucher.dmgFlags);
+                swordDamage = damage = CollisionCheck_GetSwordDamage(acHitElem->atDmgInfo.dmgFlags);
 
                 if (damage != 0) {
                     Actor_PlaySfx(&this->actor, NA_SE_EN_DODO_K_DAMAGE);
diff --git a/src/overlays/actors/ovl_Boss_Dodongo/z_boss_dodongo_data.inc.c b/src/overlays/actors/ovl_Boss_Dodongo/z_boss_dodongo_data.inc.c
index 3a62ce5333..189b0b94fc 100644
--- a/src/overlays/actors/ovl_Boss_Dodongo/z_boss_dodongo_data.inc.c
+++ b/src/overlays/actors/ovl_Boss_Dodongo/z_boss_dodongo_data.inc.c
@@ -16,8 +16,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK3,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 7, { { 8500, 1200, 0 }, 40 }, 100 },
@@ -27,8 +27,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK3,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 33, { { 2000, -2000, 0 }, 60 }, 100 },
@@ -38,8 +38,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 1, { { 0, 0, 0 }, 60 }, 100 },
@@ -49,8 +49,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 15, { { 0, 0, 0 }, 20 }, 100 },
@@ -60,8 +60,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 16, { { 0, 0, 0 }, 30 }, 100 },
@@ -71,8 +71,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 17, { { 0, 0, 0 }, 40 }, 100 },
@@ -82,8 +82,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 22, { { 0, 0, 0 }, 30 }, 100 },
@@ -93,8 +93,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 23, { { 0, 0, 0 }, 20 }, 100 },
@@ -104,8 +104,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 24, { { 0, 0, 0 }, 30 }, 100 },
@@ -115,8 +115,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 29, { { 0, 0, 0 }, 30 }, 100 },
@@ -126,8 +126,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 30, { { 0, 0, 0 }, 30 }, 100 },
@@ -137,8 +137,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 31, { { 0, 0, 0 }, 30 }, 100 },
@@ -148,8 +148,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 32, { { 0, 0, 0 }, 50 }, 100 },
@@ -159,8 +159,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 38, { { 0, 0, 0 }, 30 }, 100 },
@@ -170,8 +170,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 39, { { 0, 0, 0 }, 30 }, 100 },
@@ -181,8 +181,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 40, { { 0, 0, 0 }, 40 }, 100 },
@@ -192,8 +192,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 45, { { 0, 0, 0 }, 30 }, 100 },
@@ -203,8 +203,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 46, { { 0, 0, 0 }, 30 }, 100 },
@@ -214,8 +214,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 47, { { 0, 0, 0 }, 40 }, 100 },
diff --git a/src/overlays/actors/ovl_Boss_Fd/z_boss_fd.c b/src/overlays/actors/ovl_Boss_Fd/z_boss_fd.c
index cc3b7fd9ff..6ba94dbed5 100644
--- a/src/overlays/actors/ovl_Boss_Fd/z_boss_fd.c
+++ b/src/overlays/actors/ovl_Boss_Fd/z_boss_fd.c
@@ -1287,11 +1287,11 @@ void BossFd_CollisionCheck(BossFd* this, PlayState* play) {
     ColliderJntSphElement* headCollider = &this->collider.elements[0];
     ColliderElement* acHitElem;
 
-    if (headCollider->base.bumperFlags & BUMP_HIT) {
-        headCollider->base.bumperFlags &= ~BUMP_HIT;
+    if (headCollider->base.acElemFlags & ACELEM_HIT) {
+        headCollider->base.acElemFlags &= ~ACELEM_HIT;
         acHitElem = headCollider->base.acHitElem;
         this->actor.colChkInfo.health -= 2;
-        if (acHitElem->toucher.dmgFlags & DMG_ARROW_ICE) {
+        if (acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_ICE) {
             this->actor.colChkInfo.health -= 2;
         }
         if ((s8)this->actor.colChkInfo.health <= 2) {
diff --git a/src/overlays/actors/ovl_Boss_Fd/z_boss_fd_colchk.inc.c b/src/overlays/actors/ovl_Boss_Fd/z_boss_fd_colchk.inc.c
index c7b6a8b809..2e437fdf83 100644
--- a/src/overlays/actors/ovl_Boss_Fd/z_boss_fd_colchk.inc.c
+++ b/src/overlays/actors/ovl_Boss_Fd/z_boss_fd_colchk.inc.c
@@ -6,8 +6,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK3,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 20 }, 100 },
@@ -17,8 +17,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 1, { { 0, 0, 0 }, 20 }, 100 },
@@ -28,8 +28,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 2, { { 0, 0, 0 }, 20 }, 100 },
@@ -39,8 +39,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 3, { { 0, 0, 0 }, 20 }, 100 },
@@ -50,8 +50,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 4, { { 0, 0, 0 }, 20 }, 100 },
@@ -61,8 +61,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 5, { { 0, 0, 0 }, 20 }, 100 },
@@ -72,8 +72,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 6, { { 0, 0, 0 }, 20 }, 100 },
@@ -83,8 +83,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 7, { { 0, 0, 0 }, 20 }, 100 },
@@ -94,8 +94,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 8, { { 0, 0, 0 }, 20 }, 100 },
@@ -105,8 +105,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 9, { { 0, 0, 0 }, 20 }, 100 },
@@ -116,8 +116,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 10, { { 0, 0, 0 }, 20 }, 100 },
@@ -127,8 +127,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 11, { { 0, 0, 0 }, 20 }, 100 },
@@ -138,8 +138,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 12, { { 0, 0, 0 }, 20 }, 100 },
@@ -149,8 +149,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 13, { { 0, 0, 0 }, 20 }, 100 },
@@ -160,8 +160,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 14, { { 0, 0, 0 }, 18 }, 100 },
@@ -171,8 +171,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 15, { { 0, 0, 0 }, 16 }, 100 },
@@ -182,8 +182,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 16, { { 0, 0, 0 }, 14 }, 100 },
@@ -193,8 +193,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 17, { { 0, 0, 0 }, 12 }, 100 },
@@ -204,8 +204,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[19] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 18, { { 0, 0, 0 }, 10 }, 100 },
diff --git a/src/overlays/actors/ovl_Boss_Fd2/z_boss_fd2.c b/src/overlays/actors/ovl_Boss_Fd2/z_boss_fd2.c
index d8e688154b..7a0895bdc1 100644
--- a/src/overlays/actors/ovl_Boss_Fd2/z_boss_fd2.c
+++ b/src/overlays/actors/ovl_Boss_Fd2/z_boss_fd2.c
@@ -815,8 +815,8 @@ void BossFd2_CollisionCheck(BossFd2* this, PlayState* play) {
         Player* player = GET_PLAYER(play);
 
         for (i = 0; i < ARRAY_COUNT(this->elements); i++) {
-            if (this->collider.elements[i].base.toucherFlags & TOUCH_HIT) {
-                this->collider.elements[i].base.toucherFlags &= ~TOUCH_HIT;
+            if (this->collider.elements[i].base.atElemFlags & ATELEM_HIT) {
+                this->collider.elements[i].base.atElemFlags &= ~ATELEM_HIT;
                 Actor_PlaySfx(&player->actor, NA_SE_PL_BODY_HIT);
             }
         }
@@ -829,12 +829,12 @@ void BossFd2_CollisionCheck(BossFd2* this, PlayState* play) {
         this->collider.base.colType = COLTYPE_HIT3;
     }
 
-    if (this->collider.elements[0].base.bumperFlags & BUMP_HIT) {
-        this->collider.elements[0].base.bumperFlags &= ~BUMP_HIT;
+    if (this->collider.elements[0].base.acElemFlags & ACELEM_HIT) {
+        this->collider.elements[0].base.acElemFlags &= ~ACELEM_HIT;
 
         acHitElem = this->collider.elements[0].base.acHitElem;
         if (!bossFd->faceExposed) {
-            if (acHitElem->toucher.dmgFlags & DMG_HAMMER) {
+            if (acHitElem->atDmgInfo.dmgFlags & DMG_HAMMER) {
                 bossFd->actor.colChkInfo.health -= 2;
                 if ((s8)bossFd->actor.colChkInfo.health <= 2) {
                     bossFd->actor.colChkInfo.health = 1;
@@ -865,12 +865,12 @@ void BossFd2_CollisionCheck(BossFd2* this, PlayState* play) {
             u8 canKill = false;
             u8 damage;
 
-            if ((damage = CollisionCheck_GetSwordDamage(acHitElem->toucher.dmgFlags)) == 0) {
-                damage = (acHitElem->toucher.dmgFlags & DMG_ARROW_ICE) ? 4 : 2;
+            if ((damage = CollisionCheck_GetSwordDamage(acHitElem->atDmgInfo.dmgFlags)) == 0) {
+                damage = (acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_ICE) ? 4 : 2;
             } else {
                 canKill = true;
             }
-            if (acHitElem->toucher.dmgFlags & DMG_HOOKSHOT) {
+            if (acHitElem->atDmgInfo.dmgFlags & DMG_HOOKSHOT) {
                 damage = 0;
             }
             if (((s8)bossFd->actor.colChkInfo.health > 2) || canKill) {
diff --git a/src/overlays/actors/ovl_Boss_Fd2/z_boss_fd2_colchk.inc.c b/src/overlays/actors/ovl_Boss_Fd2/z_boss_fd2_colchk.inc.c
index f888dc4863..4ec5065401 100644
--- a/src/overlays/actors/ovl_Boss_Fd2/z_boss_fd2_colchk.inc.c
+++ b/src/overlays/actors/ovl_Boss_Fd2/z_boss_fd2_colchk.inc.c
@@ -6,8 +6,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[9] = {
             ELEMTYPE_UNK3,
             { 0xFFCFFFFF, 0x00, 0x20 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE,
             OCELEM_ON,
         },
         { 35, { { 6000, 0, 0 }, 21 }, 100 },
@@ -17,8 +17,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[9] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x20 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 18, { { 4000, 0, 0 }, 13 }, 100 },
@@ -28,8 +28,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[9] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x20 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 19, { { 3000, 0, 0 }, 13 }, 100 },
@@ -39,8 +39,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[9] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x20 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 20, { { 4000, 0, 0 }, 15 }, 100 },
@@ -50,8 +50,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[9] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x20 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 24, { { 4000, 0, 0 }, 13 }, 100 },
@@ -61,8 +61,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[9] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x20 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 25, { { 3000, 0, 0 }, 13 }, 100 },
@@ -72,8 +72,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[9] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x20 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 26, { { 3500, 1500, 0 }, 15 }, 100 },
@@ -83,8 +83,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[9] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x20 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 17, { { 0, 0, 0 }, 26 }, 100 },
@@ -94,8 +94,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[9] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x20 },
             { 0xFFCDFFFE, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 30, { { 0, 0, 0 }, 17 }, 100 },
diff --git a/src/overlays/actors/ovl_Boss_Ganon/z_boss_ganon.c b/src/overlays/actors/ovl_Boss_Ganon/z_boss_ganon.c
index cb01b96a8b..0498724369 100644
--- a/src/overlays/actors/ovl_Boss_Ganon/z_boss_ganon.c
+++ b/src/overlays/actors/ovl_Boss_Ganon/z_boss_ganon.c
@@ -70,8 +70,8 @@ static ColliderCylinderInit sDorfCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x10 },
         { 0xFFCFFFFE, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 20, 80, -50, { 0, 0, 0 } },
@@ -90,8 +90,8 @@ static ColliderCylinderInit sLightBallCylinderInit = {
         ELEMTYPE_UNK6,
         { 0x00100700, 0x00, 0x08 },
         { 0x0D900740, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 30, -15, { 0, 0, 0 } },
@@ -2691,14 +2691,14 @@ void BossGanon_UpdateDamage(BossGanon* this, PlayState* play) {
         acHitElem = this->collider.elem.acHitElem;
 
         if ((this->actionFunc == BossGanon_HitByLightBall) || (this->actionFunc == BossGanon_ChargeBigMagic)) {
-            if (acHitElem->toucher.dmgFlags & DMG_ARROW_LIGHT) {
+            if (acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_LIGHT) {
                 BossGanon_SetupVulnerable(this, play);
                 this->timers[2] = 0;
                 Actor_PlaySfx(&this->actor, NA_SE_EN_GANON_DAMAGE1);
                 this->unk_1A6 = 15;
             }
         } else if ((this->actionFunc == BossGanon_Vulnerable) && (this->unk_1C2 >= 3)) {
-            if (!(acHitElem->toucher.dmgFlags & DMG_HOOKSHOT)) {
+            if (!(acHitElem->atDmgInfo.dmgFlags & DMG_HOOKSHOT)) {
                 u8 hitWithSword = false;
                 u8 damage;
                 Vec3f sp50;
@@ -2712,7 +2712,7 @@ void BossGanon_UpdateDamage(BossGanon* this, PlayState* play) {
                                               0x1E);
                 }
 
-                damage = flags = CollisionCheck_GetSwordDamage(acHitElem->toucher.dmgFlags);
+                damage = flags = CollisionCheck_GetSwordDamage(acHitElem->atDmgInfo.dmgFlags);
 
                 if (flags == 0) {
                     damage = 2;
@@ -2746,7 +2746,7 @@ void BossGanon_UpdateDamage(BossGanon* this, PlayState* play) {
                     sCape->tearTimer = 1;
                 }
             }
-        } else if (acHitElem->toucher.dmgFlags & DMG_RANGED) {
+        } else if (acHitElem->atDmgInfo.dmgFlags & DMG_RANGED) {
             Actor_PlaySfx(&this->actor, 0);
 
             for (i = 0; i < ARRAY_COUNT(sCape->strands); i++) {
@@ -3941,7 +3941,7 @@ void BossGanon_LightBall_Update(Actor* thisx, PlayState* play2) {
 
                     this->collider.base.acFlags &= ~AC_HIT;
 
-                    if ((hitWithBottle == false) && (acHitElem->toucher.dmgFlags & DMG_SHIELD)) {
+                    if ((hitWithBottle == false) && (acHitElem->atDmgInfo.dmgFlags & DMG_SHIELD)) {
                         spBA = 2;
                         Audio_PlaySfxGeneral(NA_SE_IT_SHIELD_REFLECT_MG, &player->actor.projectedPos, 4,
                                              &gSfxDefaultFreqAndVolScale, &gSfxDefaultFreqAndVolScale,
@@ -4427,7 +4427,7 @@ void func_808E2544(Actor* thisx, PlayState* play) {
 
                 this->collider.base.acFlags &= ~AC_HIT;
 
-                if (!(acHitElem->toucher.dmgFlags & DMG_SHIELD) || Player_HasMirrorShieldEquipped(play)) {
+                if (!(acHitElem->atDmgInfo.dmgFlags & DMG_SHIELD) || Player_HasMirrorShieldEquipped(play)) {
                     Rumble_Request(this->actor.xyzDistToPlayerSq, 180, 20, 100);
                     this->unk_1C2 = 0xC;
                     this->actor.speed = -30.0f;
diff --git a/src/overlays/actors/ovl_Boss_Ganon2/z_boss_ganon2.c b/src/overlays/actors/ovl_Boss_Ganon2/z_boss_ganon2.c
index ea01e6ec7c..ced201f7b1 100644
--- a/src/overlays/actors/ovl_Boss_Ganon2/z_boss_ganon2.c
+++ b/src/overlays/actors/ovl_Boss_Ganon2/z_boss_ganon2.c
@@ -1842,10 +1842,10 @@ void func_80902348(BossGanon2* this, PlayState* play) {
 
     if (this->unk_316 == 0) {
         for (i = 0; i < ARRAY_COUNT(this->unk_864); i++) {
-            if (this->unk_444.elements[i].base.bumperFlags & BUMP_HIT) {
-                this->unk_444.elements[i].base.bumperFlags &= ~BUMP_HIT;
-            } else if (this->unk_444.elements[i].base.toucherFlags & TOUCH_HIT) {
-                this->unk_444.elements[i].base.toucherFlags &= ~TOUCH_HIT;
+            if (this->unk_444.elements[i].base.acElemFlags & ACELEM_HIT) {
+                this->unk_444.elements[i].base.acElemFlags &= ~ACELEM_HIT;
+            } else if (this->unk_444.elements[i].base.atElemFlags & ATELEM_HIT) {
+                this->unk_444.elements[i].base.atElemFlags &= ~ATELEM_HIT;
 
                 if (this->unk_312 == 1) {
                     phi_v0_2 = 0x1800;
@@ -1889,23 +1889,23 @@ void BossGanon2_CollisionCheck(BossGanon2* this, PlayState* play) {
     PRINTF("this->no_hit_time %d\n", this->unk_316);
     if (this->unk_316 != 0 || ((this->unk_334 == 0) && (this->actionFunc == func_80900890))) {
         for (i = 0; i < ARRAY_COUNT(this->unk_464); i++) {
-            this->unk_424.elements[i].base.bumperFlags &= ~BUMP_HIT;
+            this->unk_424.elements[i].base.acElemFlags &= ~ACELEM_HIT;
         }
     }
 
     PRINTF("this->look_on %d\n", this->unk_313);
     if (this->unk_313) {
         if (this->actionFunc != func_808FFFE0) {
-            if (this->unk_424.elements[0].base.bumperFlags & BUMP_HIT) {
-                this->unk_424.elements[0].base.bumperFlags &= ~BUMP_HIT;
+            if (this->unk_424.elements[0].base.acElemFlags & ACELEM_HIT) {
+                this->unk_424.elements[0].base.acElemFlags &= ~ACELEM_HIT;
                 acHitElem = this->unk_424.elements[0].base.acHitElem;
-                if ((acHitElem->toucher.dmgFlags & DMG_ARROW_LIGHT) && (this->actionFunc != func_80900890)) {
+                if ((acHitElem->atDmgInfo.dmgFlags & DMG_ARROW_LIGHT) && (this->actionFunc != func_80900890)) {
                     func_809000A0(this, play);
                     Actor_PlaySfx(&this->actor, NA_SE_EN_FANTOM_HIT_THUNDER);
                     Actor_PlaySfx(&this->actor, NA_SE_EN_MGANON_DAMAGE);
                     Audio_StopSfxById(NA_SE_EN_MGANON_UNARI);
                 } else if ((this->actionFunc == func_80900890) &&
-                           (acHitElem->toucher.dmgFlags & (DMG_JUMP_MASTER | DMG_SPIN_MASTER | DMG_SLASH_MASTER))) {
+                           (acHitElem->atDmgInfo.dmgFlags & (DMG_JUMP_MASTER | DMG_SPIN_MASTER | DMG_SLASH_MASTER))) {
                     this->unk_316 = 60;
                     this->unk_342 = 5;
                     Actor_PlaySfx(&this->actor, NA_SE_EN_MGANON_DAMAGE);
@@ -1928,8 +1928,8 @@ void BossGanon2_CollisionCheck(BossGanon2* this, PlayState* play) {
             }
         }
     } else {
-        if (this->unk_424.elements[15].base.bumperFlags & BUMP_HIT) {
-            this->unk_424.elements[15].base.bumperFlags &= ~BUMP_HIT;
+        if (this->unk_424.elements[15].base.acElemFlags & ACELEM_HIT) {
+            this->unk_424.elements[15].base.acElemFlags &= ~ACELEM_HIT;
             acHitElem = this->unk_424.elements[15].base.acHitElem;
             this->unk_316 = 60;
             this->unk_344 = 0x32;
@@ -1937,8 +1937,8 @@ void BossGanon2_CollisionCheck(BossGanon2* this, PlayState* play) {
             Actor_PlaySfx(&this->actor, NA_SE_EN_MGANON_DAMAGE);
             Audio_StopSfxById(NA_SE_EN_MGANON_UNARI);
             phi_v1_2 = 1;
-            if (acHitElem->toucher.dmgFlags & (DMG_JUMP_MASTER | DMG_SPIN_MASTER | DMG_SLASH_MASTER)) {
-                if (acHitElem->toucher.dmgFlags & DMG_JUMP_MASTER) {
+            if (acHitElem->atDmgInfo.dmgFlags & (DMG_JUMP_MASTER | DMG_SPIN_MASTER | DMG_SLASH_MASTER)) {
+                if (acHitElem->atDmgInfo.dmgFlags & DMG_JUMP_MASTER) {
                     phi_v1_2 = 4;
                 } else {
                     phi_v1_2 = 2;
diff --git a/src/overlays/actors/ovl_Boss_Ganon2/z_boss_ganon2_data.inc.c b/src/overlays/actors/ovl_Boss_Ganon2/z_boss_ganon2_data.inc.c
index 407e0f020d..f31a974108 100644
--- a/src/overlays/actors/ovl_Boss_Ganon2/z_boss_ganon2_data.inc.c
+++ b/src/overlays/actors/ovl_Boss_Ganon2/z_boss_ganon2_data.inc.c
@@ -29,8 +29,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -40,8 +40,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 1, { { 0, 0, 0 }, 30 }, 100 },
@@ -51,8 +51,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 2, { { 0, 0, 0 }, 30 }, 100 },
@@ -62,8 +62,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 3, { { 0, 0, 0 }, 20 }, 100 },
@@ -73,8 +73,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 4, { { 0, 0, 0 }, 20 }, 100 },
@@ -84,8 +84,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 5, { { 0, 0, 0 }, 20 }, 100 },
@@ -95,8 +95,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 6, { { 0, 0, 0 }, 20 }, 100 },
@@ -106,8 +106,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 7, { { 0, 0, 0 }, 20 }, 100 },
@@ -117,8 +117,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 8, { { 0, 0, 0 }, 20 }, 100 },
@@ -128,8 +128,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 9, { { 0, 0, 0 }, 20 }, 100 },
@@ -139,8 +139,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 10, { { 0, 0, 0 }, 20 }, 100 },
@@ -150,8 +150,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 11, { { 0, 0, 0 }, 20 }, 100 },
@@ -161,8 +161,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 12, { { 0, 0, 0 }, 20 }, 100 },
@@ -172,8 +172,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 13, { { 0, 0, 0 }, 20 }, 100 },
@@ -183,8 +183,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 14, { { 0, 0, 0 }, 20 }, 100 },
@@ -194,8 +194,8 @@ static ColliderJntSphElementInit sJntSphItemsInit1[] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 15, { { 0, 0, 0 }, 30 }, 100 },
@@ -221,8 +221,8 @@ static ColliderJntSphElementInit sJntSphItemsInit2[] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x40 },
             { 0xFFDFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 15, { { 0, 0, 0 }, 45 }, 100 },
@@ -232,8 +232,8 @@ static ColliderJntSphElementInit sJntSphItemsInit2[] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x40 },
             { 0xFFDFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 16, { { 0, 0, 0 }, 45 }, 100 },
diff --git a/src/overlays/actors/ovl_Boss_Ganondrof/z_boss_ganondrof.c b/src/overlays/actors/ovl_Boss_Ganondrof/z_boss_ganondrof.c
index 3b7d2ee86c..dae6502be4 100644
--- a/src/overlays/actors/ovl_Boss_Ganondrof/z_boss_ganondrof.c
+++ b/src/overlays/actors/ovl_Boss_Ganondrof/z_boss_ganondrof.c
@@ -94,8 +94,8 @@ static ColliderCylinderInit sCylinderInitBody = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x10 },
         { 0xFFCFFFFE, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 30, 90, -50, { 0, 0, 0 } },
@@ -114,8 +114,8 @@ static ColliderCylinderInit sCylinderInitSpear = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x30 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 30, -20, { 0, 0, 0 } },
@@ -1239,14 +1239,14 @@ void BossGanondrof_CollisionCheck(BossGanondrof* this, PlayState* play) {
             }
             if (this->flyMode != GND_FLY_PAINTING) {
                 if (acHit && (this->actionFunc != BossGanondrof_Stunned) &&
-                    (acHitElem->toucher.dmgFlags & DMG_RANGED)) {
+                    (acHitElem->atDmgInfo.dmgFlags & DMG_RANGED)) {
                     Actor_PlaySfx(&this->actor, NA_SE_NONE);
                     PRINTF("hit != 0 \n");
                 } else if (this->actionFunc != BossGanondrof_Charge) {
                     if (this->returnCount == 0) {
                         u8 dmg;
                         u8 canKill = false;
-                        s32 dmgFlags = acHitElem->toucher.dmgFlags;
+                        s32 dmgFlags = acHitElem->atDmgInfo.dmgFlags;
 
                         if (dmgFlags & DMG_HOOKSHOT) {
                             return;
@@ -1273,7 +1273,7 @@ void BossGanondrof_CollisionCheck(BossGanondrof* this, PlayState* play) {
                 } else {
                     Actor_PlaySfx(&this->actor, NA_SE_NONE);
                 }
-            } else if (acHit && (acHitElem->toucher.dmgFlags & DMG_RANGED)) {
+            } else if (acHit && (acHitElem->atDmgInfo.dmgFlags & DMG_RANGED)) {
                 this->work[GND_INVINC_TIMER] = 10;
                 this->actor.colChkInfo.health -= 2;
                 horse->hitTimer = 20;
diff --git a/src/overlays/actors/ovl_Boss_Goma/z_boss_goma.c b/src/overlays/actors/ovl_Boss_Goma/z_boss_goma.c
index 4de75e45a5..bdbf0fcf03 100644
--- a/src/overlays/actors/ovl_Boss_Goma/z_boss_goma.c
+++ b/src/overlays/actors/ovl_Boss_Goma/z_boss_goma.c
@@ -67,8 +67,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK3,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_EYE, { { 0, 0, 1200 }, 20 }, 100 },
@@ -78,8 +78,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_TAIL4, { { 0, 0, 0 }, 20 }, 100 },
@@ -89,8 +89,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_TAIL3, { { 0, 0, 0 }, 15 }, 100 },
@@ -100,8 +100,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_TAIL2, { { 0, 0, 0 }, 12 }, 100 },
@@ -111,8 +111,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_TAIL1, { { 0, 0, 0 }, 25 }, 100 },
@@ -122,8 +122,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_R_FEET, { { 0, 0, 0 }, 30 }, 100 },
@@ -133,8 +133,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_R_SHIN, { { 0, 0, 0 }, 15 }, 100 },
@@ -144,8 +144,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_R_THIGH_SHELL, { { 0, 0, 0 }, 15 }, 100 },
@@ -155,8 +155,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_L_ANTENNA_CLAW, { { 0, 0, 0 }, 20 }, 100 },
@@ -166,8 +166,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_R_ANTENNA_CLAW, { { 0, 0, 0 }, 20 }, 100 },
@@ -177,8 +177,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_L_FEET, { { 0, 0, 0 }, 30 }, 100 },
@@ -188,8 +188,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_L_SHIN, { { 0, 0, 0 }, 15 }, 100 },
@@ -199,8 +199,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[13] = {
             ELEMTYPE_UNK2,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { BOSSGOMA_LIMB_L_THIGH_SHELL, { { 0, 0, 0 }, 15 }, 100 },
@@ -1302,7 +1302,7 @@ void BossGoma_FloorAttack(BossGoma* this, PlayState* play) {
     switch (this->actionState) {
         case 0:
             for (i = 0; i < this->collider.count; i++) {
-                if (this->collider.elements[i].base.toucherFlags & TOUCH_HIT) {
+                if (this->collider.elements[i].base.atElemFlags & ATELEM_HIT) {
                     this->framesUntilNextAction = 10;
                     break;
                 }
@@ -1812,15 +1812,15 @@ void BossGoma_UpdateHit(BossGoma* this, PlayState* play) {
         s32 damage;
 
         if (this->eyeClosedTimer == 0 && this->actionFunc != BossGoma_CeilingSpawnGohmas &&
-            (this->collider.elements[0].base.bumperFlags & BUMP_HIT)) {
-            this->collider.elements[0].base.bumperFlags &= ~BUMP_HIT;
+            (this->collider.elements[0].base.acElemFlags & ACELEM_HIT)) {
+            this->collider.elements[0].base.acElemFlags &= ~ACELEM_HIT;
 
             if (this->actionFunc == BossGoma_CeilingMoveToCenter || this->actionFunc == BossGoma_CeilingIdle ||
                 this->actionFunc == BossGoma_CeilingPrepareSpawnGohmas) {
                 BossGoma_SetupFallStruckDown(this);
                 Actor_PlaySfx(&this->actor, NA_SE_EN_GOMA_DAM2);
             } else if (this->actionFunc == BossGoma_FloorStunned &&
-                       (damage = CollisionCheck_GetSwordDamage(acHitElem->toucher.dmgFlags)) != 0) {
+                       (damage = CollisionCheck_GetSwordDamage(acHitElem->atDmgInfo.dmgFlags)) != 0) {
                 this->actor.colChkInfo.health -= damage;
 
                 if ((s8)this->actor.colChkInfo.health > 0) {
@@ -1834,14 +1834,14 @@ void BossGoma_UpdateHit(BossGoma* this, PlayState* play) {
 
                 this->invincibilityFrames = 10;
             } else if (this->actionFunc != BossGoma_FloorStunned && this->patienceTimer != 0 &&
-                       (acHitElem->toucher.dmgFlags & (DMG_SLINGSHOT | DMG_DEKU_NUT))) {
+                       (acHitElem->atDmgInfo.dmgFlags & (DMG_SLINGSHOT | DMG_DEKU_NUT))) {
                 Actor_PlaySfx(&this->actor, NA_SE_EN_GOMA_DAM2);
                 Audio_StopSfxById(NA_SE_EN_GOMA_CRY1);
                 this->invincibilityFrames = 10;
                 BossGoma_SetupFloorStunned(this);
                 this->sfxFaintTimer = 100;
 
-                if (acHitElem->toucher.dmgFlags & DMG_DEKU_NUT) {
+                if (acHitElem->atDmgInfo.dmgFlags & DMG_DEKU_NUT) {
                     this->framesUntilNextAction = 40;
                 } else {
                     this->framesUntilNextAction = 90;
diff --git a/src/overlays/actors/ovl_Boss_Mo/z_boss_mo.c b/src/overlays/actors/ovl_Boss_Mo/z_boss_mo.c
index 08ede06b29..94021d0ee1 100644
--- a/src/overlays/actors/ovl_Boss_Mo/z_boss_mo.c
+++ b/src/overlays/actors/ovl_Boss_Mo/z_boss_mo.c
@@ -1146,23 +1146,23 @@ void BossMo_TentCollisionCheck(BossMo* this, PlayState* play) {
     ColliderElement* acHitElem;
 
     for (i1 = 0; i1 < ARRAY_COUNT(this->tentElements); i1++) {
-        if (this->tentCollider.elements[i1].base.bumperFlags & BUMP_HIT) {
+        if (this->tentCollider.elements[i1].base.acElemFlags & ACELEM_HIT) {
 
             for (i2 = 0; i2 < 19; i2++) {
-                this->tentCollider.elements[i2].base.bumperFlags &= ~BUMP_HIT;
-                this->tentCollider.elements[i2].base.toucherFlags &= ~TOUCH_HIT;
+                this->tentCollider.elements[i2].base.acElemFlags &= ~ACELEM_HIT;
+                this->tentCollider.elements[i2].base.atElemFlags &= ~ATELEM_HIT;
             }
             acHitElem = this->tentCollider.elements[i1].base.acHitElem;
             this->work[MO_TENT_INVINC_TIMER] = 5;
-            if (acHitElem->toucher.dmgFlags & DMG_MAGIC_FIRE) {
+            if (acHitElem->atDmgInfo.dmgFlags & DMG_MAGIC_FIRE) {
                 Sfx_PlaySfxAtPos(&this->tentTipPos, NA_SE_EN_MOFER_CUT);
                 this->cutIndex = 15;
                 this->meltIndex = this->cutIndex + 1;
                 this->work[MO_TENT_ACTION_STATE] = MO_TENT_CUT;
                 this->timers[0] = 40;
                 this->cutScale = 1.0f;
-            } else if (acHitElem->toucher.dmgFlags & (DMG_JUMP_MASTER | DMG_JUMP_GIANT | DMG_SPIN_MASTER |
-                                                      DMG_SPIN_GIANT | DMG_SLASH_GIANT | DMG_SLASH_MASTER)) {
+            } else if (acHitElem->atDmgInfo.dmgFlags & (DMG_JUMP_MASTER | DMG_JUMP_GIANT | DMG_SPIN_MASTER |
+                                                        DMG_SPIN_GIANT | DMG_SLASH_GIANT | DMG_SLASH_MASTER)) {
                 this->playerHitTimer = 5;
             }
             this->tentRippleSize = 0.2f;
@@ -1180,8 +1180,8 @@ void BossMo_TentCollisionCheck(BossMo* this, PlayState* play) {
                                     Rand_ZeroFloat(0.08f) + 0.13f);
             }
             break;
-        } else if (this->tentCollider.elements[i1].base.toucherFlags & TOUCH_HIT) {
-            this->tentCollider.elements[i1].base.toucherFlags &= ~TOUCH_HIT;
+        } else if (this->tentCollider.elements[i1].base.atElemFlags & ATELEM_HIT) {
+            this->tentCollider.elements[i1].base.atElemFlags &= ~ATELEM_HIT;
             this->playerHitTimer = 5;
             break;
         }
@@ -1755,13 +1755,13 @@ void BossMo_CoreCollisionCheck(BossMo* this, PlayState* play) {
         // "hit!!"
         PRINTF("Core_Damage_check 当り！！\n");
         this->coreCollider.base.acFlags &= ~AC_HIT;
-        if ((acHitElem->toucher.dmgFlags & DMG_MAGIC_FIRE) && (this->work[MO_TENT_ACTION_STATE] == MO_CORE_ATTACK)) {
+        if ((acHitElem->atDmgInfo.dmgFlags & DMG_MAGIC_FIRE) && (this->work[MO_TENT_ACTION_STATE] == MO_CORE_ATTACK)) {
             this->work[MO_TENT_ACTION_STATE] = MO_CORE_RETREAT;
         }
         // "hit 2 !!"
         PRINTF("Core_Damage_check 当り 2 ！！\n");
         if ((this->work[MO_TENT_ACTION_STATE] != MO_CORE_UNDERWATER) && (this->work[MO_TENT_INVINC_TIMER] == 0)) {
-            u8 damage = CollisionCheck_GetSwordDamage(acHitElem->toucher.dmgFlags);
+            u8 damage = CollisionCheck_GetSwordDamage(acHitElem->atDmgInfo.dmgFlags);
 
             if ((damage != 0) && (this->work[MO_TENT_ACTION_STATE] < MO_CORE_ATTACK)) {
                 // "sword hit !!"
@@ -1799,7 +1799,8 @@ void BossMo_CoreCollisionCheck(BossMo* this, PlayState* play) {
                     }
                 }
                 this->work[MO_TENT_INVINC_TIMER] = 10;
-            } else if (!(acHitElem->toucher.dmgFlags & DMG_SHIELD) && (acHitElem->toucher.dmgFlags & DMG_HOOKSHOT)) {
+            } else if (!(acHitElem->atDmgInfo.dmgFlags & DMG_SHIELD) &&
+                       (acHitElem->atDmgInfo.dmgFlags & DMG_HOOKSHOT)) {
                 if (this->work[MO_TENT_ACTION_STATE] >= MO_CORE_ATTACK) {
                     Sfx_PlaySfxAtPos(&sMorphaTent1->tentTipPos, NA_SE_EN_MOFER_CUT);
                     sMorphaTent1->cutIndex = this->work[MO_CORE_POS_IN_TENT];
diff --git a/src/overlays/actors/ovl_Boss_Mo/z_boss_mo_colchk.inc.c b/src/overlays/actors/ovl_Boss_Mo/z_boss_mo_colchk.inc.c
index 3826a4485a..0ae73dadb6 100644
--- a/src/overlays/actors/ovl_Boss_Mo/z_boss_mo_colchk.inc.c
+++ b/src/overlays/actors/ovl_Boss_Mo/z_boss_mo_colchk.inc.c
@@ -7,8 +7,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 0 }, 100 },
@@ -18,8 +18,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 1, { { 0, 0, 0 }, 0 }, 100 },
@@ -29,8 +29,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 2, { { 0, 0, 0 }, 30 }, 100 },
@@ -40,8 +40,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 3, { { 0, 0, 0 }, 24 }, 100 },
@@ -51,8 +51,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 4, { { 0, 0, 0 }, 22 }, 100 },
@@ -62,8 +62,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 5, { { 0, 0, 0 }, 20 }, 100 },
@@ -73,8 +73,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 6, { { 0, 0, 0 }, 18 }, 100 },
@@ -84,8 +84,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 7, { { 0, 0, 0 }, 16 }, 100 },
@@ -95,8 +95,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 8, { { 0, 0, 0 }, 14 }, 100 },
@@ -106,8 +106,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 9, { { 0, 0, 0 }, 12 }, 100 },
@@ -117,8 +117,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 10, { { 0, 0, 0 }, 10 }, 100 },
@@ -128,8 +128,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 11, { { 0, 0, 0 }, 10 }, 100 },
@@ -139,8 +139,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 12, { { 0, 0, 0 }, 10 }, 100 },
@@ -150,8 +150,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 13, { { 0, 0, 0 }, 10 }, 100 },
@@ -161,8 +161,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 14, { { 0, 0, 0 }, 10 }, 100 },
@@ -172,8 +172,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 15, { { 0, 0, 0 }, 10 }, 100 },
@@ -183,8 +183,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 16, { { 0, 0, 0 }, 10 }, 100 },
@@ -194,8 +194,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 17, { { 0, 0, 0 }, 10 }, 100 },
@@ -205,8 +205,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[19] = {
             ELEMTYPE_UNK4,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 18, { { 0, 0, 0 }, 10 }, 100 },
@@ -239,8 +239,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x10 },
         { 0xFFDFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 20, 40, -20, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Boss_Sst/z_boss_sst.c b/src/overlays/actors/ovl_Boss_Sst/z_boss_sst.c
index b36c58bd7e..dd2136039d 100644
--- a/src/overlays/actors/ovl_Boss_Sst/z_boss_sst.c
+++ b/src/overlays/actors/ovl_Boss_Sst/z_boss_sst.c
@@ -873,10 +873,10 @@ void BossSst_HeadStunned(BossSst* this, PlayState* play) {
 void BossSst_HeadSetupVulnerable(BossSst* this) {
     Animation_MorphToLoop(&this->skelAnime, &gBongoHeadStunnedAnim, -5.0f);
     this->colliderCyl.base.acFlags |= AC_ON;
-    this->colliderCyl.elem.bumper.dmgFlags = DMG_SWORD | DMG_DEKU_STICK;
+    this->colliderCyl.elem.acDmgInfo.dmgFlags = DMG_SWORD | DMG_DEKU_STICK;
     this->actor.speed = 0.0f;
-    this->colliderJntSph.elements[10].base.bumperFlags |= (BUMP_ON | BUMP_HOOKABLE);
-    this->colliderJntSph.elements[0].base.bumperFlags &= ~BUMP_ON;
+    this->colliderJntSph.elements[10].base.acElemFlags |= (ACELEM_ON | ACELEM_HOOKABLE);
+    this->colliderJntSph.elements[0].base.acElemFlags &= ~ACELEM_ON;
     if (this->actionFunc != BossSst_HeadDamage) {
         this->timer = 50;
     }
@@ -932,9 +932,9 @@ void BossSst_HeadDamage(BossSst* this, PlayState* play) {
 void BossSst_HeadSetupRecover(BossSst* this) {
     Animation_MorphToPlayOnce(&this->skelAnime, &gBongoHeadRecoverAnim, -5.0f);
     this->colliderCyl.base.acFlags &= ~AC_ON;
-    this->colliderCyl.elem.bumper.dmgFlags = DMG_DEFAULT;
-    this->colliderJntSph.elements[10].base.bumperFlags &= ~(BUMP_ON | BUMP_HOOKABLE);
-    this->colliderJntSph.elements[0].base.bumperFlags |= BUMP_ON;
+    this->colliderCyl.elem.acDmgInfo.dmgFlags = DMG_DEFAULT;
+    this->colliderJntSph.elements[10].base.acElemFlags &= ~(ACELEM_ON | ACELEM_HOOKABLE);
+    this->colliderJntSph.elements[0].base.acElemFlags |= ACELEM_ON;
     this->vVanish = true;
     this->actor.speed = 5.0f;
     this->actionFunc = BossSst_HeadRecover;
@@ -2500,7 +2500,7 @@ void BossSst_HandSetDamage(BossSst* this, s32 damage) {
 
     this->colliderJntSph.base.atFlags |= AT_ON;
     for (i = 0; i < 11; i++) {
-        this->colliderJntSph.elements[i].base.toucher.damage = damage;
+        this->colliderJntSph.elements[i].base.atDmgInfo.damage = damage;
     }
 }
 
diff --git a/src/overlays/actors/ovl_Boss_Sst/z_boss_sst_colchk.inc.c b/src/overlays/actors/ovl_Boss_Sst/z_boss_sst_colchk.inc.c
index 16b7c4e8d1..f73bfac8ec 100644
--- a/src/overlays/actors/ovl_Boss_Sst/z_boss_sst_colchk.inc.c
+++ b/src/overlays/actors/ovl_Boss_Sst/z_boss_sst_colchk.inc.c
@@ -6,8 +6,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 2, { { 2000, -1500, 250 }, 65 }, 100 },
@@ -17,8 +17,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 10, { { 0, 0, 0 }, 22 }, 100 },
@@ -28,8 +28,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 11, { { 500, 0, 0 }, 22 }, 100 },
@@ -39,8 +39,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 15, { { -250, -250, 0 }, 25 }, 100 },
@@ -50,8 +50,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 16, { { 500, -250, 0 }, 25 }, 100 },
@@ -61,8 +61,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 20, { { 250, -250, 0 }, 25 }, 100 },
@@ -72,8 +72,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 21, { { 500, -250, 0 }, 25 }, 100 },
@@ -83,8 +83,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 25, { { 0, 0, 0 }, 27 }, 100 },
@@ -94,8 +94,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 26, { { 750, 0, 0 }, 26 }, 100 },
@@ -105,8 +105,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 5, { { 750, -150, 0 }, 21 }, 100 },
@@ -116,8 +116,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHand[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 6, { { 750, 0, 0 }, 20 }, 100 },
@@ -143,8 +143,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 7, { { 1500, 0, 0 }, 70 }, 100 },
@@ -154,8 +154,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 6, { { 0, 0, 0 }, 75 }, 100 },
@@ -165,8 +165,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 4, { { 5000, 0, 0 }, 120 }, 100 },
@@ -176,8 +176,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 3, { { -2500, 0, 0 }, 150 }, 100 },
@@ -187,8 +187,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 43, { { 1500, 0, 0 }, 80 }, 100 },
@@ -198,8 +198,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 43, { { 7500, 0, 0 }, 70 }, 100 },
@@ -209,8 +209,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 44, { { 3000, 0, 0 }, 60 }, 100 },
@@ -220,8 +220,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 40, { { 1500, 0, 0 }, 80 }, 100 },
@@ -231,8 +231,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 40, { { 7500, 0, 0 }, 70 }, 100 },
@@ -242,8 +242,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 41, { { 3000, 0, 0 }, 60 }, 100 },
@@ -253,8 +253,8 @@ static ColliderJntSphElementInit sJntSphItemsInitHead[11] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x30 },
             { 0x00000080, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 8, { { 1500, 0, 0 }, 70 }, 100 },
@@ -287,8 +287,8 @@ static ColliderCylinderInit sCylinderInitHead = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 85, 100, -50, { 0, 0, 0 } },
@@ -307,8 +307,8 @@ static ColliderCylinderInit sCylinderInitHand = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x04, 0x10 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { 85, 1, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Boss_Tw/z_boss_tw.c b/src/overlays/actors/ovl_Boss_Tw/z_boss_tw.c
index abf3fc96e5..4372245150 100644
--- a/src/overlays/actors/ovl_Boss_Tw/z_boss_tw.c
+++ b/src/overlays/actors/ovl_Boss_Tw/z_boss_tw.c
@@ -144,8 +144,8 @@ static ColliderCylinderInit sCylinderInitBlasts = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x30 },
         { 0x00100000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 25, 35, -17, { 0, 0, 0 } },
@@ -164,8 +164,8 @@ static ColliderCylinderInit sCylinderInitKoumeKotake = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x20 },
         { 0xFFCDFFFE, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 45, 120, -30, { 0, 0, 0 } },
@@ -184,8 +184,8 @@ static ColliderCylinderInit sCylinderInitTwinrova = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x20 },
         { 0xFFCDFFFE, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 45, 120, -30, { 0, 0, 0 } },
@@ -464,7 +464,7 @@ void BossTw_Init(Actor* thisx, PlayState* play2) {
 
         if (this->actor.params == TW_FIRE_BLAST || this->actor.params == TW_FIRE_BLAST_GROUND) {
             this->actionFunc = BossTw_BlastFire;
-            this->collider.elem.toucher.effect = 1;
+            this->collider.elem.atDmgInfo.effect = 1;
         } else if (this->actor.params == TW_ICE_BLAST || this->actor.params == TW_ICE_BLAST_GROUND) {
             this->actionFunc = BossTw_BlastIce;
         } else if (this->actor.params >= TW_DEATHBALL_KOTAKE) {
@@ -3097,7 +3097,7 @@ void BossTw_TwinrovaUpdate(Actor* thisx, PlayState* play2) {
                 ColliderElement* acHitElem = this->collider.elem.acHitElem;
 
                 this->collider.base.acFlags &= ~AC_HIT;
-                if (acHitElem->toucher.dmgFlags & (DMG_SLINGSHOT | DMG_ARROW)) {}
+                if (acHitElem->atDmgInfo.dmgFlags & (DMG_SLINGSHOT | DMG_ARROW)) {}
             }
         } else if (this->collider.base.acFlags & AC_HIT) {
             u8 damage;
@@ -3106,7 +3106,7 @@ void BossTw_TwinrovaUpdate(Actor* thisx, PlayState* play2) {
 
             this->collider.base.acFlags &= ~AC_HIT;
             swordDamage = false;
-            damage = CollisionCheck_GetSwordDamage(acHitElem->toucher.dmgFlags);
+            damage = CollisionCheck_GetSwordDamage(acHitElem->atDmgInfo.dmgFlags);
 
             if (damage == 0) {
                 damage = 2;
@@ -3114,7 +3114,7 @@ void BossTw_TwinrovaUpdate(Actor* thisx, PlayState* play2) {
                 swordDamage = true;
             }
 
-            if (!(acHitElem->toucher.dmgFlags & DMG_HOOKSHOT)) {
+            if (!(acHitElem->atDmgInfo.dmgFlags & DMG_HOOKSHOT)) {
                 if (((s8)this->actor.colChkInfo.health < 3) && !swordDamage) {
                     damage = 0;
                 }
@@ -4338,7 +4338,7 @@ s32 BossTw_BlastShieldCheck(BossTw* this, PlayState* play) {
             this->collider.base.atFlags &= ~AT_HIT;
             acHitElem = this->collider.elem.acHitElem;
 
-            if (acHitElem->toucher.dmgFlags & DMG_SHIELD) {
+            if (acHitElem->atDmgInfo.dmgFlags & DMG_SHIELD) {
                 this->work[INVINC_TIMER] = 7;
                 play->envCtx.lightBlend = 1.0f;
                 Rumble_Request(0.0f, 100, 5, 4);
diff --git a/src/overlays/actors/ovl_Boss_Va/z_boss_va.c b/src/overlays/actors/ovl_Boss_Va/z_boss_va.c
index 7b189e8754..49a3b69f63 100644
--- a/src/overlays/actors/ovl_Boss_Va/z_boss_va.c
+++ b/src/overlays/actors/ovl_Boss_Va/z_boss_va.c
@@ -213,8 +213,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFEF, 0x03, 0x08 },
         { 0x00000010, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 85, 120, 0, { 0, 0, 0 } },
@@ -226,8 +226,8 @@ static ColliderJntSphElementInit sJntSphElementsInitSupport[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000010, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 25 }, 100 },
@@ -253,8 +253,8 @@ static ColliderJntSphElementInit sJntSphElementsInitBari[1] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x03, 0x04 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -287,8 +287,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x03, 0x04 },
         { 0x00000010, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL | TOUCH_UNK7,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL | ATELEM_UNK7,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -1128,7 +1128,7 @@ void BossVa_BodyPhase2(BossVa* this, PlayState* play) {
             Actor_SetColorFilter(&this->actor, COLORFILTER_COLORFLAG_BLUE, 255, COLORFILTER_BUFFLAG_OPA, 160);
             this->actor.colorFilterTimer = this->invincibilityTimer;
         } else {
-            this->colliderBody.elem.bumper.dmgFlags = DMG_BOOMERANG;
+            this->colliderBody.elem.acDmgInfo.dmgFlags = DMG_BOOMERANG;
         }
     }
 
@@ -1138,7 +1138,7 @@ void BossVa_BodyPhase2(BossVa* this, PlayState* play) {
         if (this->colliderBody.base.ac->id == ACTOR_EN_BOOM) {
             sPhase2Timer &= 0xFE00;
             Actor_SetColorFilter(&this->actor, COLORFILTER_COLORFLAG_BLUE, 255, COLORFILTER_BUFFLAG_OPA, 160);
-            this->colliderBody.elem.bumper.dmgFlags = DMG_SWORD | DMG_BOOMERANG | DMG_DEKU_STICK;
+            this->colliderBody.elem.acDmgInfo.dmgFlags = DMG_SWORD | DMG_BOOMERANG | DMG_DEKU_STICK;
         } else {
             sKillBari++;
             if ((this->actor.colorFilterTimer != 0) && !(this->actor.colorFilterParams & 0x4000)) {
@@ -1217,7 +1217,7 @@ void BossVa_BodyPhase2(BossVa* this, PlayState* play) {
 }
 
 void BossVa_SetupBodyPhase3(BossVa* this) {
-    this->colliderBody.elem.bumper.dmgFlags = DMG_BOOMERANG;
+    this->colliderBody.elem.acDmgInfo.dmgFlags = DMG_BOOMERANG;
     this->actor.speed = 0.0f;
     sPhase3StopMoving = false;
     BossVa_SetupAction(this, BossVa_BodyPhase3);
@@ -1421,7 +1421,7 @@ void BossVa_BodyPhase4(BossVa* this, PlayState* play) {
             }
             Math_SmoothStepToF(&this->actor.speed, ((sFightPhase - PHASE_4 + 1) * 1.5f) + 4.0f, 1.0f, 0.25f, 0.0f);
         }
-        this->colliderBody.elem.bumper.dmgFlags = DMG_BOOMERANG;
+        this->colliderBody.elem.acDmgInfo.dmgFlags = DMG_BOOMERANG;
     } else {
         Math_SmoothStepToS(&this->vaBodySpinRate, 0, 1, 0x96, 0);
         if (this->timer > 0) {
@@ -1429,7 +1429,7 @@ void BossVa_BodyPhase4(BossVa* this, PlayState* play) {
                 this->timer = 35;
             }
             Math_SmoothStepToF(&this->actor.shape.yOffset, -480.0f, 1.0f, 30.0f, 0.0f);
-            this->colliderBody.elem.bumper.dmgFlags = DMG_SWORD | DMG_BOOMERANG | DMG_DEKU_STICK;
+            this->colliderBody.elem.acDmgInfo.dmgFlags = DMG_SWORD | DMG_BOOMERANG | DMG_DEKU_STICK;
             this->timer--;
         } else {
             if ((player->stateFlags1 & PLAYER_STATE1_26) && (this->timer < -60)) {
diff --git a/src/overlays/actors/ovl_Demo_Gj/z_demo_gj.c b/src/overlays/actors/ovl_Demo_Gj/z_demo_gj.c
index 3df0db29d0..e508f6cc8b 100644
--- a/src/overlays/actors/ovl_Demo_Gj/z_demo_gj.c
+++ b/src/overlays/actors/ovl_Demo_Gj/z_demo_gj.c
@@ -27,8 +27,8 @@ static ColliderCylinderInitType1 sCylinderInit1 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000008, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 30, 100, 0, { 0, 0, 0 } },
@@ -46,8 +46,8 @@ static ColliderCylinderInitType1 sCylinderInit2 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000008, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 25, 110, 0, { 0, 0, 0 } },
@@ -65,8 +65,8 @@ static ColliderCylinderInitType1 sCylinderInit3 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000008, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 25, 200, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Demo_Kekkai/z_demo_kekkai.c b/src/overlays/actors/ovl_Demo_Kekkai/z_demo_kekkai.c
index 7f4d6aef4b..9568574a4b 100644
--- a/src/overlays/actors/ovl_Demo_Kekkai/z_demo_kekkai.c
+++ b/src/overlays/actors/ovl_Demo_Kekkai/z_demo_kekkai.c
@@ -46,8 +46,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x07, 0x04 },
         { 0x00002000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 680, 220, 120, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Door_Ana/z_door_ana.c b/src/overlays/actors/ovl_Door_Ana/z_door_ana.c
index 5482623bd6..5487a20b4c 100644
--- a/src/overlays/actors/ovl_Door_Ana/z_door_ana.c
+++ b/src/overlays/actors/ovl_Door_Ana/z_door_ana.c
@@ -43,8 +43,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK2,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000048, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 50, 10, 0, { 0 } },
diff --git a/src/overlays/actors/ovl_Door_Killer/z_door_killer.c b/src/overlays/actors/ovl_Door_Killer/z_door_killer.c
index d9b03e1694..26630ef776 100644
--- a/src/overlays/actors/ovl_Door_Killer/z_door_killer.c
+++ b/src/overlays/actors/ovl_Door_Killer/z_door_killer.c
@@ -54,8 +54,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x10 },
         { 0x0001FFEE, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 20, 100, 0, { 0, 0, 0 } },
@@ -67,8 +67,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000008, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 100 }, 100 },
@@ -423,10 +423,10 @@ void DoorKiller_Wait(DoorKiller* this, PlayState* play) {
 
     if (DoorKiller_IsHit(&this->actor, play)) {
         // AC cylinder: wobble if hit by most weapons, die if hit by explosives or hammer
-        if (this->colliderCylinder.elem.acHitElem->toucher.dmgFlags & (DMG_RANGED | DMG_SLASH | DMG_DEKU_STICK)) {
+        if (this->colliderCylinder.elem.acHitElem->atDmgInfo.dmgFlags & (DMG_RANGED | DMG_SLASH | DMG_DEKU_STICK)) {
             this->timer = 16;
             this->actionFunc = DoorKiller_Wobble;
-        } else if (this->colliderCylinder.elem.acHitElem->toucher.dmgFlags & (DMG_HAMMER_SWING | DMG_EXPLOSIVE)) {
+        } else if (this->colliderCylinder.elem.acHitElem->atDmgInfo.dmgFlags & (DMG_HAMMER_SWING | DMG_EXPLOSIVE)) {
             DoorKiller_SpawnRubble(&this->actor, play);
             this->actionFunc = DoorKiller_Die;
             SfxSource_PlaySfxAtFixedWorldPos(play, &this->actor.world.pos, 20, NA_SE_EN_KDOOR_BREAK);
diff --git a/src/overlays/actors/ovl_En_Am/z_en_am.c b/src/overlays/actors/ovl_En_Am/z_en_am.c
index de26bf1140..bed0a0be6f 100644
--- a/src/overlays/actors/ovl_En_Am/z_en_am.c
+++ b/src/overlays/actors/ovl_En_Am/z_en_am.c
@@ -64,8 +64,8 @@ static ColliderCylinderInit sHurtCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 15, 70, 0, { 0, 0, 0 } },
@@ -84,8 +84,8 @@ static ColliderCylinderInit sBlockCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00400106, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 15, 70, 0, { 0, 0, 0 } },
@@ -104,8 +104,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_En_Ani/z_en_ani.c b/src/overlays/actors/ovl_En_Ani/z_en_ani.c
index bf9f2fe92a..1e9dbb9333 100644
--- a/src/overlays/actors/ovl_En_Ani/z_en_ani.c
+++ b/src/overlays/actors/ovl_En_Ani/z_en_ani.c
@@ -51,8 +51,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 40, 0, { 0 } },
diff --git a/src/overlays/actors/ovl_En_Anubice/z_en_anubice.c b/src/overlays/actors/ovl_En_Anubice/z_en_anubice.c
index b8280d1a9a..a370e6b36a 100644
--- a/src/overlays/actors/ovl_En_Anubice/z_en_anubice.c
+++ b/src/overlays/actors/ovl_En_Anubice/z_en_anubice.c
@@ -50,8 +50,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 29, 103, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Anubice_Fire/z_en_anubice_fire.c b/src/overlays/actors/ovl_En_Anubice_Fire/z_en_anubice_fire.c
index 897d216677..19851e173b 100644
--- a/src/overlays/actors/ovl_En_Anubice_Fire/z_en_anubice_fire.c
+++ b/src/overlays/actors/ovl_En_Anubice_Fire/z_en_anubice_fire.c
@@ -44,8 +44,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x01, 0x04 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 0, 0, 0, { 0, 0, 0 } },
@@ -113,7 +113,7 @@ void func_809B27D8(EnAnubiceFire* this, PlayState* play) {
             Actor_PlaySfx(&this->actor, NA_SE_IT_SHIELD_REFLECT_SW);
             this->cylinder.base.atFlags &= ~(AT_HIT | AT_BOUNCED | AT_TYPE_ENEMY);
             this->cylinder.base.atFlags |= AT_TYPE_PLAYER;
-            this->cylinder.elem.toucher.dmgFlags = DMG_DEKU_STICK;
+            this->cylinder.elem.atDmgInfo.dmgFlags = DMG_DEKU_STICK;
             this->unk_15A = 30;
             this->actor.params = 1;
             this->actor.velocity.x *= -1.0f;
diff --git a/src/overlays/actors/ovl_En_Arrow/z_en_arrow.c b/src/overlays/actors/ovl_En_Arrow/z_en_arrow.c
index 39b86fc6b3..75aa432f7f 100644
--- a/src/overlays/actors/ovl_En_Arrow/z_en_arrow.c
+++ b/src/overlays/actors/ovl_En_Arrow/z_en_arrow.c
@@ -44,8 +44,8 @@ static ColliderQuadInit sColliderInit = {
         ELEMTYPE_UNK2,
         { 0x00000020, 0x00, 0x01 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_NEAREST | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_NEAREST | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -121,15 +121,15 @@ void EnArrow_Init(Actor* thisx, PlayState* play) {
         Collider_SetQuad(play, &this->collider, &this->actor, &sColliderInit);
 
         if (this->actor.params <= ARROW_NORMAL) {
-            this->collider.elem.toucherFlags &= ~TOUCH_SFX_MASK;
-            this->collider.elem.toucherFlags |= TOUCH_SFX_NORMAL;
+            this->collider.elem.atElemFlags &= ~ATELEM_SFX_MASK;
+            this->collider.elem.atElemFlags |= ATELEM_SFX_NORMAL;
         }
 
         if (this->actor.params < 0) {
             this->collider.base.atFlags = (AT_ON | AT_TYPE_ENEMY);
         } else if (this->actor.params <= ARROW_SEED) {
-            this->collider.elem.toucher.dmgFlags = dmgFlags[this->actor.params];
-            LOG_HEX("this->at_info.cl_elem.at_btl_info.at_type", this->collider.elem.toucher.dmgFlags,
+            this->collider.elem.atDmgInfo.dmgFlags = dmgFlags[this->actor.params];
+            LOG_HEX("this->at_info.cl_elem.at_btl_info.at_type", this->collider.elem.atDmgInfo.dmgFlags,
                     "../z_en_arrow.c", 707);
         }
     }
@@ -298,10 +298,10 @@ void EnArrow_Fly(EnArrow* this, PlayState* play) {
                     this->hitFlags |= 1;
                     this->hitFlags |= 2;
 
-                    if (this->collider.elem.atHitElem->bumperFlags & BUMP_HIT) {
-                        this->actor.world.pos.x = this->collider.elem.atHitElem->bumper.hitPos.x;
-                        this->actor.world.pos.y = this->collider.elem.atHitElem->bumper.hitPos.y;
-                        this->actor.world.pos.z = this->collider.elem.atHitElem->bumper.hitPos.z;
+                    if (this->collider.elem.atHitElem->acElemFlags & ACELEM_HIT) {
+                        this->actor.world.pos.x = this->collider.elem.atHitElem->acDmgInfo.hitPos.x;
+                        this->actor.world.pos.y = this->collider.elem.atHitElem->acDmgInfo.hitPos.y;
+                        this->actor.world.pos.z = this->collider.elem.atHitElem->acDmgInfo.hitPos.z;
                     }
 
                     func_809B3CEC(play, this);
diff --git a/src/overlays/actors/ovl_En_Ba/z_en_ba.c b/src/overlays/actors/ovl_En_Ba/z_en_ba.c
index 03528ef5e3..97fd430c4b 100644
--- a/src/overlays/actors/ovl_En_Ba/z_en_ba.c
+++ b/src/overlays/actors/ovl_En_Ba/z_en_ba.c
@@ -43,8 +43,8 @@ static ColliderJntSphElementInit sJntSphElementInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000010, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 8, { { 0, 0, 0 }, 20 }, 100 },
@@ -54,8 +54,8 @@ static ColliderJntSphElementInit sJntSphElementInit[2] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 13, { { 0, 0, 0 }, 25 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Bb/z_en_bb.c b/src/overlays/actors/ovl_En_Bb/z_en_bb.c
index 7ff5296e23..63875b009c 100644
--- a/src/overlays/actors/ovl_En_Bb/z_en_bb.c
+++ b/src/overlays/actors/ovl_En_Bb/z_en_bb.c
@@ -213,8 +213,8 @@ static ColliderJntSphElementInit sJntSphElementInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, -120, 0 }, 4 }, 300 },
@@ -331,9 +331,9 @@ void EnBb_Init(Actor* thisx, PlayState* play) {
         this->timer = 0;
         this->flameScaleY = 80.0f;
         this->flameScaleX = 100.0f;
-        this->collider.elements[0].base.toucherFlags = TOUCH_ON | TOUCH_SFX_HARD;
-        this->collider.elements[0].base.toucher.dmgFlags = DMG_DEFAULT;
-        this->collider.elements[0].base.toucher.damage = 8;
+        this->collider.elements[0].base.atElemFlags = ATELEM_ON | ATELEM_SFX_HARD;
+        this->collider.elements[0].base.atDmgInfo.dmgFlags = DMG_DEFAULT;
+        this->collider.elements[0].base.atDmgInfo.damage = 8;
         this->bobSize = this->actionState * 20.0f;
         this->flamePrimAlpha = 255;
         this->moveMode = BBMOVE_NORMAL;
@@ -351,7 +351,7 @@ void EnBb_Init(Actor* thisx, PlayState* play) {
                 thisx->naviEnemyId = NAVI_ENEMY_RED_BUBBLE;
                 thisx->colChkInfo.damageTable = &sDamageTableRed;
                 this->flameEnvColor.r = 255;
-                this->collider.elements[0].base.toucher.effect = 1;
+                this->collider.elements[0].base.atDmgInfo.effect = 1;
                 EnBb_SetupRed(play, this);
                 break;
             case ENBB_WHITE:
@@ -1155,7 +1155,7 @@ void EnBb_CollisionCheck(EnBb* this, PlayState* play) {
         Actor_SetDropFlag(&this->actor, &this->collider.elements[0].base, false);
         switch (this->dmgEffect) {
             case 7:
-                this->actor.freezeTimer = this->collider.elements[0].base.acHitElem->toucher.damage;
+                this->actor.freezeTimer = this->collider.elements[0].base.acHitElem->atDmgInfo.damage;
                 FALLTHROUGH;
             case 5:
                 this->fireIceTimer = 0x30;
@@ -1165,7 +1165,7 @@ void EnBb_CollisionCheck(EnBb* this, PlayState* play) {
                 //! Din's Fire on a white bubble will do just that. The mechanism is complex and described below.
                 goto block_15;
             case 6:
-                this->actor.freezeTimer = this->collider.elements[0].base.acHitElem->toucher.damage;
+                this->actor.freezeTimer = this->collider.elements[0].base.acHitElem->atDmgInfo.damage;
                 break;
             case 8:
             case 9:
diff --git a/src/overlays/actors/ovl_En_Bigokuta/z_en_bigokuta.c b/src/overlays/actors/ovl_En_Bigokuta/z_en_bigokuta.c
index b982fa7ddb..23c7bb6db5 100644
--- a/src/overlays/actors/ovl_En_Bigokuta/z_en_bigokuta.c
+++ b/src/overlays/actors/ovl_En_Bigokuta/z_en_bigokuta.c
@@ -48,8 +48,8 @@ static ColliderJntSphElementInit sJntSphElementInit[1] = {
             ELEMTYPE_UNK1,
             { 0x20000000, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_HARD,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_HARD,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 1, { { 0, 45, -30 }, 75 }, 100 },
@@ -82,8 +82,8 @@ static ColliderCylinderInit sCylinderInit[] = {
           ELEMTYPE_UNK1,
           { 0x20000000, 0x00, 0x08 },
           { 0xFFCFFFE7, 0x00, 0x00 },
-          TOUCH_ON | TOUCH_SFX_HARD,
-          BUMP_ON,
+          ATELEM_ON | ATELEM_SFX_HARD,
+          ACELEM_ON,
           OCELEM_ON,
       },
       { 50, 100, 0, { 30, 0, 12 } } },
@@ -99,8 +99,8 @@ static ColliderCylinderInit sCylinderInit[] = {
           ELEMTYPE_UNK1,
           { 0x20000000, 0x00, 0x08 },
           { 0xFFCFFFE7, 0x00, 0x00 },
-          TOUCH_ON | TOUCH_SFX_HARD,
-          BUMP_ON,
+          ATELEM_ON | ATELEM_SFX_HARD,
+          ACELEM_ON,
           OCELEM_ON,
       },
       { 50, 100, 0, { -30, 0, 12 } } },
@@ -333,7 +333,7 @@ void func_809BD524(EnBigokuta* this) {
     this->unk_19A = 0;
     this->cylinder[0].base.atFlags |= AT_ON;
     Actor_PlaySfx(&this->actor, NA_SE_EN_DAIOCTA_MAHI);
-    if (this->collider.elements[0].base.acHitElem->toucher.dmgFlags & DMG_DEKU_NUT) {
+    if (this->collider.elements[0].base.acHitElem->atDmgInfo.dmgFlags & DMG_DEKU_NUT) {
         this->unk_195 = true;
         this->unk_196 = 20;
     } else {
diff --git a/src/overlays/actors/ovl_En_Bili/z_en_bili.c b/src/overlays/actors/ovl_En_Bili/z_en_bili.c
index 6410634593..b7b4d5d760 100644
--- a/src/overlays/actors/ovl_En_Bili/z_en_bili.c
+++ b/src/overlays/actors/ovl_En_Bili/z_en_bili.c
@@ -53,8 +53,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x03, 0x08 },
         { 0xFFCFFFFF, 0x01, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 9, 28, -20, { 0, 0, 0 } },
@@ -141,7 +141,7 @@ void EnBili_Destroy(Actor* thisx, PlayState* play) {
 
 void EnBili_SetupFloatIdle(EnBili* this) {
     this->actor.speed = 0.7f;
-    this->collider.elem.bumper.effect = 1; // Shock?
+    this->collider.elem.acDmgInfo.effect = 1; // Shock?
     this->timer = 32;
     this->actor.home.pos.y = this->actor.world.pos.y;
     this->actor.gravity = 0.0f;
@@ -237,7 +237,7 @@ void EnBili_SetupDie(EnBili* this) {
  */
 void EnBili_SetupStunned(EnBili* this) {
     this->timer = 80;
-    this->collider.elem.bumper.effect = 0;
+    this->collider.elem.acDmgInfo.effect = 0;
     this->actor.gravity = -1.0f;
     this->actor.speed = 0.0f;
     Actor_SetColorFilter(&this->actor, COLORFILTER_COLORFLAG_BLUE, 150, COLORFILTER_BUFFLAG_XLU, 80);
@@ -586,7 +586,7 @@ void EnBili_UpdateDamage(EnBili* this, PlayState* play) {
                 EnBili_SetupBurnt(this);
             }
 
-            if (this->collider.elem.acHitElem->toucher.dmgFlags & DMG_ARROW) {
+            if (this->collider.elem.acHitElem->atDmgInfo.dmgFlags & DMG_ARROW) {
                 this->actor.flags |= ACTOR_FLAG_4;
             }
         }
diff --git a/src/overlays/actors/ovl_En_Bom/z_en_bom.c b/src/overlays/actors/ovl_En_Bom/z_en_bom.c
index c95cfed5a5..7022780554 100644
--- a/src/overlays/actors/ovl_En_Bom/z_en_bom.c
+++ b/src/overlays/actors/ovl_En_Bom/z_en_bom.c
@@ -43,8 +43,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK2,
         { 0x00000000, 0x00, 0x00 },
         { 0x0003F828, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 6, 11, 14, { 0, 0, 0 } },
@@ -56,8 +56,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000008, 0x00, 0x08 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 0 }, 100 },
@@ -101,7 +101,7 @@ void EnBom_Init(Actor* thisx, PlayState* play) {
     Collider_InitJntSph(play, &this->explosionCollider);
     Collider_SetCylinder(play, &this->bombCollider, thisx, &sCylinderInit);
     Collider_SetJntSph(play, &this->explosionCollider, thisx, &sJntSphInit, &this->explosionColliderItems[0]);
-    this->explosionColliderItems[0].base.toucher.damage += (thisx->shape.rot.z & 0xFF00) >> 8;
+    this->explosionColliderItems[0].base.atDmgInfo.damage += (thisx->shape.rot.z & 0xFF00) >> 8;
 
     thisx->shape.rot.z &= 0xFF;
     if (thisx->shape.rot.z & 0x80) {
@@ -241,7 +241,7 @@ void EnBom_Update(Actor* thisx, PlayState* play2) {
     }
 
     if ((thisx->xzDistToPlayer >= 20.0f) || (ABS(thisx->yDistToPlayer) >= 80.0f)) {
-        this->bumpOn = true;
+        this->colliderSetOC = true;
     }
 
     this->actionFunc(this, play);
@@ -333,8 +333,8 @@ void EnBom_Update(Actor* thisx, PlayState* play2) {
     if (thisx->params <= BOMB_BODY) {
         Collider_UpdateCylinder(thisx, &this->bombCollider);
 
-        // if link is not holding the bomb anymore and bump conditions are met, subscribe to OC
-        if (!Actor_HasParent(thisx, play) && this->bumpOn) {
+        // if link is not holding the bomb anymore and conditions for OC are met, subscribe to OC
+        if (!Actor_HasParent(thisx, play) && this->colliderSetOC) {
             CollisionCheck_SetOC(play, &play->colChkCtx, &this->bombCollider.base);
         }
 
diff --git a/src/overlays/actors/ovl_En_Bom/z_en_bom.h b/src/overlays/actors/ovl_En_Bom/z_en_bom.h
index 7399d6edd3..aebadfa064 100644
--- a/src/overlays/actors/ovl_En_Bom/z_en_bom.h
+++ b/src/overlays/actors/ovl_En_Bom/z_en_bom.h
@@ -16,7 +16,7 @@ typedef struct EnBom {
     /* 0x01F8 */ s16 timer;
     /* 0x01FA */ s16 flashSpeedScale;
     /* 0x01FC */ f32 flashIntensity;
-    /* 0x0200 */ u8 bumpOn;
+    /* 0x0200 */ u8 colliderSetOC;
     /* 0x0204 */ EnBomActionFunc actionFunc;
 } EnBom; // size = 0x0208
 
diff --git a/src/overlays/actors/ovl_En_Bom_Chu/z_en_bom_chu.c b/src/overlays/actors/ovl_En_Bom_Chu/z_en_bom_chu.c
index df24a602ee..5af68e436d 100644
--- a/src/overlays/actors/ovl_En_Bom_Chu/z_en_bom_chu.c
+++ b/src/overlays/actors/ovl_En_Bom_Chu/z_en_bom_chu.c
@@ -33,8 +33,8 @@ static ColliderJntSphElementInit sJntSphElemInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 1, { { 0, 0, 0 }, 12 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Bombf/z_en_bombf.c b/src/overlays/actors/ovl_En_Bombf/z_en_bombf.c
index d091fbe3a0..f4864d5307 100644
--- a/src/overlays/actors/ovl_En_Bombf/z_en_bombf.c
+++ b/src/overlays/actors/ovl_En_Bombf/z_en_bombf.c
@@ -46,8 +46,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK2,
         { 0x00000000, 0x00, 0x00 },
         { 0x0003F828, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 9, 18, 10, { 0, 0, 0 } },
@@ -59,8 +59,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000008, 0x00, 0x08 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NONE,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 0 }, 100 },
@@ -121,7 +121,7 @@ void EnBombf_Init(Actor* thisx, PlayState* play) {
         EnBombf_SetupAction(this, EnBombf_Move);
     } else {
         thisx->colChkInfo.mass = MASS_IMMOVABLE;
-        this->bumpOn = true;
+        this->colliderSetOC = true;
         this->flowerBombScale = 1.0f;
         EnBombf_SetupGrowBomb(this, thisx->params);
     }
@@ -320,13 +320,13 @@ void EnBombf_Update(Actor* thisx, PlayState* play) {
     s32 pad[2];
     EnBombf* this = (EnBombf*)thisx;
 
-    if ((this->isFuseEnabled) && (this->timer != 0)) {
+    if (this->isFuseEnabled && (this->timer != 0)) {
         this->timer--;
     }
 
-    if ((!this->bumpOn) && (!Actor_HasParent(thisx, play)) &&
+    if (!this->colliderSetOC && !Actor_HasParent(thisx, play) &&
         ((thisx->xzDistToPlayer >= 20.0f) || (ABS(thisx->yDistToPlayer) >= 80.0f))) {
-        this->bumpOn = true;
+        this->colliderSetOC = true;
     }
 
     this->actionFunc(this, play);
@@ -444,7 +444,7 @@ void EnBombf_Update(Actor* thisx, PlayState* play) {
 
         Collider_UpdateCylinder(thisx, &this->bombCollider);
 
-        if ((this->flowerBombScale >= 1.0f) && (this->bumpOn)) {
+        if ((this->flowerBombScale >= 1.0f) && this->colliderSetOC) {
             CollisionCheck_SetOC(play, &play->colChkCtx, &this->bombCollider.base);
         }
 
diff --git a/src/overlays/actors/ovl_En_Bombf/z_en_bombf.h b/src/overlays/actors/ovl_En_Bombf/z_en_bombf.h
index 02d10b7c45..226dfebefb 100644
--- a/src/overlays/actors/ovl_En_Bombf/z_en_bombf.h
+++ b/src/overlays/actors/ovl_En_Bombf/z_en_bombf.h
@@ -16,7 +16,7 @@ typedef struct EnBombf {
     /* 0x01F8 */ s16 timer;
     /* 0x01FC */ EnBombfActionFunc actionFunc;
     /* 0x0200 */ s32 isFuseEnabled; // enables the ability to ignite and tick down to explode
-    /* 0x0204 */ u8 bumpOn;
+    /* 0x0204 */ u8 colliderSetOC;
     /* 0x0206 */ s16 flashSpeedScale;
     /* 0x0208 */ f32 flashIntensity;
     /* 0x020C */ f32 flowerBombScale;
diff --git a/src/overlays/actors/ovl_En_Boom/z_en_boom.c b/src/overlays/actors/ovl_En_Boom/z_en_boom.c
index a92aa86d5e..e5697f91c6 100644
--- a/src/overlays/actors/ovl_En_Boom/z_en_boom.c
+++ b/src/overlays/actors/ovl_En_Boom/z_en_boom.c
@@ -41,8 +41,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK2,
         { 0x00000010, 0x00, 0x01 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_NEAREST | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_NEAREST | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_En_Brob/z_en_brob.c b/src/overlays/actors/ovl_En_Brob/z_en_brob.c
index 64aa97e4d0..99e9775ea4 100644
--- a/src/overlays/actors/ovl_En_Brob/z_en_brob.c
+++ b/src/overlays/actors/ovl_En_Brob/z_en_brob.c
@@ -47,8 +47,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK1,
         { 0xFFCFFFFF, 0x03, 0x08 },
         { 0xFFCFFFFF, 0x01, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 8000, 11000, -5000, { 0, 0, 0 } },
@@ -263,8 +263,8 @@ void EnBrob_Update(Actor* thisx, PlayState* play2) {
 
     acHits[0] = (this->colliders[0].base.acFlags & AC_HIT) != 0;
     acHits[1] = (this->colliders[1].base.acFlags & AC_HIT) != 0;
-    if ((acHits[0] && (this->colliders[0].elem.acHitElem->toucher.dmgFlags & DMG_BOOMERANG)) ||
-        (acHits[1] && (this->colliders[1].elem.acHitElem->toucher.dmgFlags & DMG_BOOMERANG))) {
+    if ((acHits[0] && (this->colliders[0].elem.acHitElem->atDmgInfo.dmgFlags & DMG_BOOMERANG)) ||
+        (acHits[1] && (this->colliders[1].elem.acHitElem->atDmgInfo.dmgFlags & DMG_BOOMERANG))) {
 
         for (i = 0; i < 2; i++) {
             this->colliders[i].base.atFlags &= ~(AT_HIT | AT_BOUNCED);
@@ -273,8 +273,8 @@ void EnBrob_Update(Actor* thisx, PlayState* play2) {
 
         EnBrob_SetupStunned(this);
     } else if ((this->colliders[0].base.atFlags & AT_HIT) || (this->colliders[1].base.atFlags & AT_HIT) ||
-               (acHits[0] && (this->colliders[0].elem.acHitElem->toucher.dmgFlags & DMG_SLASH_KOKIRI)) ||
-               (acHits[1] && (this->colliders[1].elem.acHitElem->toucher.dmgFlags & DMG_SLASH_KOKIRI))) {
+               (acHits[0] && (this->colliders[0].elem.acHitElem->atDmgInfo.dmgFlags & DMG_SLASH_KOKIRI)) ||
+               (acHits[1] && (this->colliders[1].elem.acHitElem->atDmgInfo.dmgFlags & DMG_SLASH_KOKIRI))) {
 
         if (this->actionFunc == EnBrob_MoveUp && !(this->colliders[0].base.atFlags & AT_BOUNCED) &&
             !(this->colliders[1].base.atFlags & AT_BOUNCED)) {
diff --git a/src/overlays/actors/ovl_En_Bubble/z_en_bubble.c b/src/overlays/actors/ovl_En_Bubble/z_en_bubble.c
index d8082a7973..902520173b 100644
--- a/src/overlays/actors/ovl_En_Bubble/z_en_bubble.c
+++ b/src/overlays/actors/ovl_En_Bubble/z_en_bubble.c
@@ -30,8 +30,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x04 },
             { 0xFFCFD753, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 16 }, 100 },
@@ -41,8 +41,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00002824, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_NO_AT_INFO | BUMP_NO_DAMAGE | BUMP_NO_SWORD_SFX | BUMP_NO_HITMARK,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_NO_AT_INFO | ACELEM_NO_DAMAGE | ACELEM_NO_SWORD_SFX | ACELEM_NO_HITMARK,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 16 }, 100 },
@@ -97,10 +97,10 @@ void EnBubble_SetDimensions(EnBubble* this, f32 dim) {
 u32 func_809CBCBC(EnBubble* this) {
     ColliderElement* elem = &this->colliderSphere.elements[0].base;
 
-    elem->toucher.dmgFlags = DMG_EXPLOSIVE;
-    elem->toucher.effect = 0;
-    elem->toucher.damage = 4;
-    elem->toucherFlags = TOUCH_ON;
+    elem->atDmgInfo.dmgFlags = DMG_EXPLOSIVE;
+    elem->atDmgInfo.effect = 0;
+    elem->atDmgInfo.damage = 4;
+    elem->atElemFlags = ATELEM_ON;
     this->actor.velocity.y = 0.0f;
     return 6;
 }
@@ -112,7 +112,7 @@ u32 func_809CBCEC(EnBubble* this) {
 }
 
 void EnBubble_DamagePlayer(EnBubble* this, PlayState* play) {
-    s32 damage = -this->colliderSphere.elements[0].base.toucher.damage;
+    s32 damage = -this->colliderSphere.elements[0].base.atDmgInfo.damage;
 
     play->damagePlayer(play, damage);
     func_8002F7A0(play, &this->actor, 6.0f, this->actor.yawTowardsPlayer, 6.0f);
@@ -196,7 +196,7 @@ void EnBubble_Vec3fNormalize(Vec3f* vec) {
 
 void EnBubble_Fly(EnBubble* this, PlayState* play) {
     CollisionPoly* poly;
-    Actor* bumpActor;
+    Actor* attackerActor;
     Vec3f sp84;
     Vec3f sp78;
     Vec3f sp6C;
@@ -206,21 +206,21 @@ void EnBubble_Fly(EnBubble* this, PlayState* play) {
     s32 bgId;
     u8 bounceCount;
 
-    if (this->colliderSphere.elements[1].base.bumperFlags & BUMP_HIT) {
-        bumpActor = this->colliderSphere.base.ac;
-        this->normalizedBumpVelocity = bumpActor->velocity;
-        EnBubble_Vec3fNormalize(&this->normalizedBumpVelocity);
-        this->velocityFromBump.x += (this->normalizedBumpVelocity.x * 3.0f);
-        this->velocityFromBump.y += (this->normalizedBumpVelocity.y * 3.0f);
-        this->velocityFromBump.z += (this->normalizedBumpVelocity.z * 3.0f);
+    if (this->colliderSphere.elements[1].base.acElemFlags & ACELEM_HIT) {
+        attackerActor = this->colliderSphere.base.ac;
+        this->normalizedAttackerVelocity = attackerActor->velocity;
+        EnBubble_Vec3fNormalize(&this->normalizedAttackerVelocity);
+        this->velocityFromAttack.x += (this->normalizedAttackerVelocity.x * 3.0f);
+        this->velocityFromAttack.y += (this->normalizedAttackerVelocity.y * 3.0f);
+        this->velocityFromAttack.z += (this->normalizedAttackerVelocity.z * 3.0f);
     }
     this->sinkSpeed -= 0.1f;
     if (this->sinkSpeed < this->actor.minVelocityY) {
         this->sinkSpeed = this->actor.minVelocityY;
     }
-    sp54.x = this->velocityFromBounce.x + this->velocityFromBump.x;
-    sp54.y = this->velocityFromBounce.y + this->velocityFromBump.y + this->sinkSpeed;
-    sp54.z = this->velocityFromBounce.z + this->velocityFromBump.z;
+    sp54.x = this->velocityFromBounce.x + this->velocityFromAttack.x;
+    sp54.y = this->velocityFromBounce.y + this->velocityFromAttack.y + this->sinkSpeed;
+    sp54.z = this->velocityFromBounce.z + this->velocityFromAttack.z;
     EnBubble_Vec3fNormalize(&sp54);
 
     sp78.x = this->actor.world.pos.x;
@@ -243,7 +243,7 @@ void EnBubble_Fly(EnBubble* this, PlayState* play) {
             this->bounceCount = 0;
         }
         bounceSpeed = (this->bounceCount == 0) ? 3.6000001f : 3.0f;
-        this->velocityFromBump.x = this->velocityFromBump.y = this->velocityFromBump.z = 0.0f;
+        this->velocityFromAttack.x = this->velocityFromAttack.y = this->velocityFromAttack.z = 0.0f;
         this->velocityFromBounce.x = (this->bounceDirection.x * bounceSpeed);
         this->velocityFromBounce.y = (this->bounceDirection.y * bounceSpeed);
         this->velocityFromBounce.z = (this->bounceDirection.z * bounceSpeed);
@@ -262,7 +262,7 @@ void EnBubble_Fly(EnBubble* this, PlayState* play) {
             this->bounceCount = 0;
         }
         bounceSpeed = (this->bounceCount == 0) ? 3.6000001f : 3.0f;
-        this->velocityFromBump.x = this->velocityFromBump.y = this->velocityFromBump.z = 0.0f;
+        this->velocityFromAttack.x = this->velocityFromAttack.y = this->velocityFromAttack.z = 0.0f;
         this->velocityFromBounce.x = (this->bounceDirection.x * bounceSpeed);
         this->velocityFromBounce.y = (this->bounceDirection.y * bounceSpeed);
         this->velocityFromBounce.z = (this->bounceDirection.z * bounceSpeed);
@@ -271,12 +271,12 @@ void EnBubble_Fly(EnBubble* this, PlayState* play) {
         this->graphicRotSpeed = 128.0f;
         this->graphicEccentricity = 0.48f;
     }
-    this->actor.velocity.x = this->velocityFromBounce.x + this->velocityFromBump.x;
-    this->actor.velocity.y = this->velocityFromBounce.y + this->velocityFromBump.y + this->sinkSpeed;
-    this->actor.velocity.z = this->velocityFromBounce.z + this->velocityFromBump.z;
-    Math_ApproachF(&this->velocityFromBump.x, 0.0f, 0.3f, 0.1f);
-    Math_ApproachF(&this->velocityFromBump.y, 0.0f, 0.3f, 0.1f);
-    Math_ApproachF(&this->velocityFromBump.z, 0.0f, 0.3f, 0.1f);
+    this->actor.velocity.x = this->velocityFromBounce.x + this->velocityFromAttack.x;
+    this->actor.velocity.y = this->velocityFromBounce.y + this->velocityFromAttack.y + this->sinkSpeed;
+    this->actor.velocity.z = this->velocityFromBounce.z + this->velocityFromAttack.z;
+    Math_ApproachF(&this->velocityFromAttack.x, 0.0f, 0.3f, 0.1f);
+    Math_ApproachF(&this->velocityFromAttack.y, 0.0f, 0.3f, 0.1f);
+    Math_ApproachF(&this->velocityFromAttack.z, 0.0f, 0.3f, 0.1f);
 }
 
 u32 func_809CC648(EnBubble* this) {
@@ -284,7 +284,7 @@ u32 func_809CC648(EnBubble* this) {
         return false;
     }
     this->colliderSphere.base.acFlags &= ~AC_HIT;
-    if (this->colliderSphere.elements[1].base.bumperFlags & BUMP_HIT) {
+    if (this->colliderSphere.elements[1].base.acElemFlags & ACELEM_HIT) {
         this->unk_1F0.x = this->colliderSphere.base.ac->velocity.x / 10.0f;
         this->unk_1F0.y = this->colliderSphere.base.ac->velocity.y / 10.0f;
         this->unk_1F0.z = this->colliderSphere.base.ac->velocity.z / 10.0f;
diff --git a/src/overlays/actors/ovl_En_Bubble/z_en_bubble.h b/src/overlays/actors/ovl_En_Bubble/z_en_bubble.h
index 938d1b2fd4..d753768811 100644
--- a/src/overlays/actors/ovl_En_Bubble/z_en_bubble.h
+++ b/src/overlays/actors/ovl_En_Bubble/z_en_bubble.h
@@ -27,8 +27,8 @@ typedef struct EnBubble {
     /* 0x0228 */ u8 bounceCount;
     /* 0x022C */ Vec3f bounceDirection;
     /* 0x0238 */ Vec3f velocityFromBounce;
-    /* 0x0244 */ Vec3f normalizedBumpVelocity;
-    /* 0x0250 */ Vec3f velocityFromBump;
+    /* 0x0244 */ Vec3f normalizedAttackerVelocity;
+    /* 0x0250 */ Vec3f velocityFromAttack;
     /* 0x025C */ f32 sinkSpeed;
 } EnBubble; // size = 0x0260
 
diff --git a/src/overlays/actors/ovl_En_Butte/z_en_butte.c b/src/overlays/actors/ovl_En_Butte/z_en_butte.c
index 42f549b753..e91e59d47c 100644
--- a/src/overlays/actors/ovl_En_Butte/z_en_butte.c
+++ b/src/overlays/actors/ovl_En_Butte/z_en_butte.c
@@ -30,8 +30,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
           ELEMTYPE_UNK0,
           { 0x00000000, 0x00, 0x00 },
           { 0xFFCFFFFF, 0x000, 0x00 },
-          TOUCH_NONE,
-          BUMP_NONE,
+          ATELEM_NONE,
+          ACELEM_NONE,
           OCELEM_ON,
       },
       { 0, { { 0, 0, 0 }, 5 }, 100 } },
diff --git a/src/overlays/actors/ovl_En_Bw/z_en_bw.c b/src/overlays/actors/ovl_En_Bw/z_en_bw.c
index 1516d57d55..5380555405 100644
--- a/src/overlays/actors/ovl_En_Bw/z_en_bw.c
+++ b/src/overlays/actors/ovl_En_Bw/z_en_bw.c
@@ -58,8 +58,8 @@ static ColliderCylinderInit sCylinderInit1 = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x01, 0x08 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { 30, 65, 0, { 0, 0, 0 } },
@@ -78,8 +78,8 @@ static ColliderCylinderInit sCylinderInit2 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 35, 0, { 0, 0, 0 } },
@@ -766,7 +766,7 @@ void EnBw_Update(Actor* thisx, PlayState* play2) {
             func_8002836C(play, &thisx->world.pos, &velocity, &accel, &sp50, &sp4C, 0x3C, 0, 0x14);
         }
         if (this->unk_248 <= 0.4f) {
-            this->collider1.elem.toucher.effect = 0;
+            this->collider1.elem.atDmgInfo.effect = 0;
             if (((play->gameplayFrames & 1) == 0) && (this->unk_220 < 5) && (this->unk_23C == 0)) {
                 accel.y = -0.1f;
                 velocity.x = Rand_CenteredFloat(4.0f);
@@ -786,7 +786,7 @@ void EnBw_Update(Actor* thisx, PlayState* play2) {
                               20.0f - (this->unk_248 * 40.0f));
             }
         } else {
-            this->collider1.elem.toucher.effect = 1;
+            this->collider1.elem.atDmgInfo.effect = 1;
         }
 
         this->unk_234 = Actor_TestFloorInDirection(thisx, play, 50.0f, thisx->world.rot.y);
diff --git a/src/overlays/actors/ovl_En_Bx/z_en_bx.c b/src/overlays/actors/ovl_En_Bx/z_en_bx.c
index 35f1565912..c0c9fb7038 100644
--- a/src/overlays/actors/ovl_En_Bx/z_en_bx.c
+++ b/src/overlays/actors/ovl_En_Bx/z_en_bx.c
@@ -39,8 +39,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK1,
         { 0xFFCFFFFF, 0x03, 0x04 },
         { 0xFFCFFFFF, 0x01, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 60, 100, 100, { 0, 0, 0 } },
@@ -59,8 +59,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x03, 0x04 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_En_Clear_Tag/z_en_clear_tag.c b/src/overlays/actors/ovl_En_Clear_Tag/z_en_clear_tag.c
index f13b19221f..a47186b62a 100644
--- a/src/overlays/actors/ovl_En_Clear_Tag/z_en_clear_tag.c
+++ b/src/overlays/actors/ovl_En_Clear_Tag/z_en_clear_tag.c
@@ -47,8 +47,8 @@ static ColliderCylinderInit sArwingCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x04 },
         { 0xFFDFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 15, 30, 10, { 0, 0, 0 } },
@@ -67,8 +67,8 @@ static ColliderCylinderInit sLaserCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x04 },
         { 0xFFDFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 15, 30, 10, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Cow/z_en_cow.c b/src/overlays/actors/ovl_En_Cow/z_en_cow.c
index 2c9b8753e9..a9e667089f 100644
--- a/src/overlays/actors/ovl_En_Cow/z_en_cow.c
+++ b/src/overlays/actors/ovl_En_Cow/z_en_cow.c
@@ -51,8 +51,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Crow/z_en_crow.c b/src/overlays/actors/ovl_En_Crow/z_en_crow.c
index 3cd26ef460..af8ec2dabe 100644
--- a/src/overlays/actors/ovl_En_Crow/z_en_crow.c
+++ b/src/overlays/actors/ovl_En_Crow/z_en_crow.c
@@ -36,8 +36,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_HARD,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_HARD,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 1, { { 0, 0, 0 }, 20 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Cs/z_en_cs.c b/src/overlays/actors/ovl_En_Cs/z_en_cs.c
index 31790ebeef..d99e291207 100644
--- a/src/overlays/actors/ovl_En_Cs/z_en_cs.c
+++ b/src/overlays/actors/ovl_En_Cs/z_en_cs.c
@@ -40,8 +40,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 18, 63, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Daiku/z_en_daiku.c b/src/overlays/actors/ovl_En_Daiku/z_en_daiku.c
index f8b93bc48d..c99af39956 100644
--- a/src/overlays/actors/ovl_En_Daiku/z_en_daiku.c
+++ b/src/overlays/actors/ovl_En_Daiku/z_en_daiku.c
@@ -66,8 +66,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 18, 66, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Daiku_Kakariko/z_en_daiku_kakariko.c b/src/overlays/actors/ovl_En_Daiku_Kakariko/z_en_daiku_kakariko.c
index 9b5564cfc5..f5e31493c3 100644
--- a/src/overlays/actors/ovl_En_Daiku_Kakariko/z_en_daiku_kakariko.c
+++ b/src/overlays/actors/ovl_En_Daiku_Kakariko/z_en_daiku_kakariko.c
@@ -49,8 +49,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 18, 66, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Dekubaba/z_en_dekubaba.c b/src/overlays/actors/ovl_En_Dekubaba/z_en_dekubaba.c
index 73bf8d9321..265e58cc00 100644
--- a/src/overlays/actors/ovl_En_Dekubaba/z_en_dekubaba.c
+++ b/src/overlays/actors/ovl_En_Dekubaba/z_en_dekubaba.c
@@ -47,8 +47,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[7] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_HARD,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_HARD,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 1, { { 0, 100, 1000 }, 15 }, 100 },
@@ -58,8 +58,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[7] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 51, { { 0, 0, 1500 }, 8 }, 100 },
@@ -69,8 +69,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[7] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 52, { { 0, 0, 500 }, 8 }, 100 },
@@ -80,8 +80,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[7] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 53, { { 0, 0, 1500 }, 8 }, 100 },
@@ -91,8 +91,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[7] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 54, { { 0, 0, 500 }, 8 }, 100 },
@@ -102,8 +102,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[7] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 55, { { 0, 0, 1500 }, 8 }, 100 },
@@ -113,8 +113,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[7] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 56, { { 0, 0, 500 }, 8 }, 100 },
@@ -282,7 +282,7 @@ void EnDekubaba_DisableACColliderElems(EnDekubaba* this) {
     s32 i;
 
     for (i = 1; i < ARRAY_COUNT(this->colliderElements); i++) {
-        this->collider.elements[i].base.bumperFlags &= ~BUMP_ON;
+        this->collider.elements[i].base.acElemFlags &= ~ACELEM_ON;
     }
 }
 
@@ -417,7 +417,7 @@ void EnDekubaba_SetupStunnedVertical(EnDekubaba* this) {
     s32 i;
 
     for (i = 1; i < ARRAY_COUNT(this->colliderElements); i++) {
-        this->collider.elements[i].base.bumperFlags |= BUMP_ON;
+        this->collider.elements[i].base.acElemFlags |= ACELEM_ON;
     }
 
     if (this->timer == 1) {
diff --git a/src/overlays/actors/ovl_En_Dekunuts/z_en_dekunuts.c b/src/overlays/actors/ovl_En_Dekunuts/z_en_dekunuts.c
index 6fd1207fe3..6e14eba6ce 100644
--- a/src/overlays/actors/ovl_En_Dekunuts/z_en_dekunuts.c
+++ b/src/overlays/actors/ovl_En_Dekunuts/z_en_dekunuts.c
@@ -55,8 +55,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 18, 32, 0, { 0, 0, 0 } },
@@ -204,7 +204,7 @@ void EnDekunuts_SetupGasp(EnDekunuts* this) {
 
 void EnDekunuts_SetupBeDamaged(EnDekunuts* this) {
     Animation_MorphToPlayOnce(&this->skelAnime, &gDekuNutsDamageAnim, -3.0f);
-    if (this->collider.elem.acHitElem->toucher.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT)) {
+    if (this->collider.elem.acHitElem->atDmgInfo.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT)) {
         this->actor.world.rot.y = this->collider.base.ac->world.rot.y;
     } else {
         this->actor.world.rot.y = Actor_WorldYawTowardActor(&this->actor, this->collider.base.ac) + 0x8000;
diff --git a/src/overlays/actors/ovl_En_Dh/z_en_dh.c b/src/overlays/actors/ovl_En_Dh/z_en_dh.c
index f5694d2bf0..ccf7f4af2c 100644
--- a/src/overlays/actors/ovl_En_Dh/z_en_dh.c
+++ b/src/overlays/actors/ovl_En_Dh/z_en_dh.c
@@ -56,8 +56,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000008, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 35, 70, 0, { 0, 0, 0 } },
@@ -69,8 +69,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON | OCELEM_UNK3,
         },
         { 1, { { 0, 0, 0 }, 20 }, 100 },
@@ -302,8 +302,8 @@ void EnDh_Attack(EnDh* this, PlayState* play) {
         Animation_Change(&this->skelAnime, &object_dh_Anim_004658, -1.0f, this->skelAnime.curFrame, 0.0f, ANIMMODE_ONCE,
                          -4.0f);
         this->actionState = 4;
-        this->collider2.base.atFlags = this->collider2.elements[0].base.toucherFlags = AT_NONE; // also TOUCH_NONE
-        this->collider2.elements[0].base.toucher.dmgFlags = this->collider2.elements[0].base.toucher.damage = 0;
+        this->collider2.base.atFlags = this->collider2.elements[0].base.atElemFlags = AT_NONE; // also ATELEM_NONE
+        this->collider2.elements[0].base.atDmgInfo.dmgFlags = this->collider2.elements[0].base.atDmgInfo.damage = 0;
     }
     switch (this->actionState) {
         case 1:
@@ -316,16 +316,17 @@ void EnDh_Attack(EnDh* this, PlayState* play) {
             break;
         case 2:
             if (this->skelAnime.curFrame >= 4.0f) {
-                this->collider2.base.atFlags = this->collider2.elements[0].base.toucherFlags =
-                    AT_ON | AT_TYPE_ENEMY; // also TOUCH_ON | TOUCH_SFX_WOOD
-                this->collider2.elements[0].base.toucher.dmgFlags = DMG_DEFAULT;
-                this->collider2.elements[0].base.toucher.damage = 8;
+                this->collider2.base.atFlags = this->collider2.elements[0].base.atElemFlags =
+                    AT_ON | AT_TYPE_ENEMY; // also ATELEM_ON | ATELEM_SFX_WOOD
+                this->collider2.elements[0].base.atDmgInfo.dmgFlags = DMG_DEFAULT;
+                this->collider2.elements[0].base.atDmgInfo.damage = 8;
             }
             if (this->collider2.base.atFlags & AT_BOUNCED) {
                 this->collider2.base.atFlags &= ~(AT_HIT | AT_BOUNCED);
-                this->collider2.base.atFlags = this->collider2.elements[0].base.toucherFlags =
-                    AT_NONE; // also TOUCH_NONE
-                this->collider2.elements[0].base.toucher.dmgFlags = this->collider2.elements[0].base.toucher.damage = 0;
+                this->collider2.base.atFlags = this->collider2.elements[0].base.atElemFlags =
+                    AT_NONE; // also ATELEM_NONE
+                this->collider2.elements[0].base.atDmgInfo.dmgFlags =
+                    this->collider2.elements[0].base.atDmgInfo.damage = 0;
                 this->actionState++;
             } else if (this->collider2.base.atFlags & AT_HIT) {
                 this->collider2.base.atFlags &= ~AT_HIT;
@@ -343,9 +344,10 @@ void EnDh_Attack(EnDh* this, PlayState* play) {
                 Animation_Change(&this->skelAnime, &object_dh_Anim_004658, -1.0f,
                                  Animation_GetLastFrame(&object_dh_Anim_004658), 0.0f, ANIMMODE_ONCE, -4.0f);
                 this->actionState++;
-                this->collider2.base.atFlags = this->collider2.elements[0].base.toucherFlags =
-                    AT_NONE; // also TOUCH_NONE
-                this->collider2.elements[0].base.toucher.dmgFlags = this->collider2.elements[0].base.toucher.damage = 0;
+                this->collider2.base.atFlags = this->collider2.elements[0].base.atElemFlags =
+                    AT_NONE; // also ATELEM_NONE
+                this->collider2.elements[0].base.atDmgInfo.dmgFlags =
+                    this->collider2.elements[0].base.atDmgInfo.damage = 0;
             }
             break;
         case 5:
@@ -374,10 +376,10 @@ void EnDh_Burrow(EnDh* this, PlayState* play) {
         case 0:
             this->actionState++;
             this->drawDirtWave++;
-            this->collider1.base.atFlags = this->collider1.elem.toucherFlags =
-                AT_ON | AT_TYPE_ENEMY; // also TOUCH_ON | TOUCH_SFX_WOOD
-            this->collider1.elem.toucher.dmgFlags = DMG_DEFAULT;
-            this->collider1.elem.toucher.damage = 4;
+            this->collider1.base.atFlags = this->collider1.elem.atElemFlags =
+                AT_ON | AT_TYPE_ENEMY; // also ATELEM_ON | ATELEM_SFX_WOOD
+            this->collider1.elem.atDmgInfo.dmgFlags = DMG_DEFAULT;
+            this->collider1.elem.atDmgInfo.damage = 4;
             FALLTHROUGH;
         case 1:
             this->dirtWavePhase += 0x47E;
@@ -393,8 +395,8 @@ void EnDh_Burrow(EnDh* this, PlayState* play) {
         case 2:
             this->drawDirtWave = false;
             this->collider1.dim.radius = 35;
-            this->collider1.base.atFlags = this->collider1.elem.toucherFlags = AT_NONE; // Also TOUCH_NONE
-            this->collider1.elem.toucher.dmgFlags = this->collider1.elem.toucher.damage = 0;
+            this->collider1.base.atFlags = this->collider1.elem.atElemFlags = AT_NONE; // Also ATELEM_NONE
+            this->collider1.elem.atDmgInfo.dmgFlags = this->collider1.elem.atDmgInfo.damage = 0;
             EnDh_SetupWait(this);
             break;
     }
@@ -477,8 +479,8 @@ void EnDh_CollisionCheck(EnDh* this, PlayState* play) {
     if ((this->collider2.base.acFlags & AC_HIT) && !this->retreat) {
         this->collider2.base.acFlags &= ~AC_HIT;
         if ((this->actor.colChkInfo.damageEffect != 0) && (this->actor.colChkInfo.damageEffect != 6)) {
-            this->collider2.base.atFlags = this->collider2.elements[0].base.toucherFlags = AT_NONE; // also TOUCH_NONE
-            this->collider2.elements[0].base.toucher.dmgFlags = this->collider2.elements[0].base.toucher.damage = 0;
+            this->collider2.base.atFlags = this->collider2.elements[0].base.atElemFlags = AT_NONE; // also ATELEM_NONE
+            this->collider2.elements[0].base.atDmgInfo.dmgFlags = this->collider2.elements[0].base.atDmgInfo.damage = 0;
             if (player->unk_844 != 0) {
                 this->unk_258 = player->unk_845;
             }
diff --git a/src/overlays/actors/ovl_En_Dha/z_en_dha.c b/src/overlays/actors/ovl_En_Dha/z_en_dha.c
index b78ff72600..17ec0b85ef 100644
--- a/src/overlays/actors/ovl_En_Dha/z_en_dha.c
+++ b/src/overlays/actors/ovl_En_Dha/z_en_dha.c
@@ -76,8 +76,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 1, { { 0, 0, 0 }, 12 }, 100 },
@@ -87,8 +87,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 2, { { 3200, 0, 0 }, 10 }, 100 },
@@ -98,8 +98,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 3, { { 1200, 0, 0 }, 10 }, 100 },
@@ -109,8 +109,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 4, { { 2700, 0, 0 }, 10 }, 100 },
@@ -120,8 +120,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 5, { { 1200, 0, 0 }, 10 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Diving_Game/z_en_diving_game.c b/src/overlays/actors/ovl_En_Diving_Game/z_en_diving_game.c
index 6e33517bf3..d0ba252073 100644
--- a/src/overlays/actors/ovl_En_Diving_Game/z_en_diving_game.c
+++ b/src/overlays/actors/ovl_En_Diving_Game/z_en_diving_game.c
@@ -61,8 +61,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_NONE | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 10, 10, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Dns/z_en_dns.c b/src/overlays/actors/ovl_En_Dns/z_en_dns.c
index 4268bc2ba2..9d1c37c472 100644
--- a/src/overlays/actors/ovl_En_Dns/z_en_dns.c
+++ b/src/overlays/actors/ovl_En_Dns/z_en_dns.c
@@ -66,8 +66,8 @@ static ColliderCylinderInitType1 sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 18, 32, 0, { 0, 0, 0 } },
@@ -156,7 +156,7 @@ void EnDns_Init(Actor* thisx, PlayState* play) {
     Actor_SetScale(&this->actor, 0.01f);
 
     this->actor.colChkInfo.mass = MASS_IMMOVABLE;
-    this->bumpOn = true;
+    this->isColliderEnabled = true;
     this->standOnGround = true;
     this->dropCollectible = false;
     this->actor.speed = 0.0f;
@@ -434,7 +434,7 @@ void EnDns_SetupBurrow(EnDns* this, PlayState* play) {
         if ((Message_GetState(&play->msgCtx) == TEXT_STATE_DONE) && Message_ShouldAdvance(play)) {
             this->dnsItemEntry->payment(this);
             this->dropCollectible = true;
-            this->bumpOn = false;
+            this->isColliderEnabled = false;
             this->actor.flags &= ~ACTOR_FLAG_0;
             EnDns_ChangeAnim(this, DNS_ANIM_BURROW);
             this->actionFunc = EnDns_Burrow;
@@ -442,7 +442,7 @@ void EnDns_SetupBurrow(EnDns* this, PlayState* play) {
     } else {
         this->dnsItemEntry->payment(this);
         this->dropCollectible = true;
-        this->bumpOn = false;
+        this->isColliderEnabled = false;
         this->actor.flags &= ~ACTOR_FLAG_0;
         EnDns_ChangeAnim(this, DNS_ANIM_BURROW);
         this->actionFunc = EnDns_Burrow;
@@ -451,7 +451,7 @@ void EnDns_SetupBurrow(EnDns* this, PlayState* play) {
 
 void EnDns_SetupNoSaleBurrow(EnDns* this, PlayState* play) {
     if ((Message_GetState(&play->msgCtx) == TEXT_STATE_DONE) && Message_ShouldAdvance(play)) {
-        this->bumpOn = false;
+        this->isColliderEnabled = false;
         this->actor.flags &= ~ACTOR_FLAG_0;
         EnDns_ChangeAnim(this, DNS_ANIM_BURROW);
         this->actionFunc = EnDns_Burrow;
@@ -515,7 +515,7 @@ void EnDns_Update(Actor* thisx, PlayState* play) {
         Actor_UpdateBgCheckInfo(play, &this->actor, 20.0f, 20.0f, 20.0f, UPDBGCHECKINFO_FLAG_2);
     }
 
-    if (this->bumpOn) {
+    if (this->isColliderEnabled) {
         Collider_UpdateCylinder(&this->actor, &this->collider);
         CollisionCheck_SetOC(play, &play->colChkCtx, &this->collider.base);
     }
diff --git a/src/overlays/actors/ovl_En_Dns/z_en_dns.h b/src/overlays/actors/ovl_En_Dns/z_en_dns.h
index fe931bec32..a6ef632230 100644
--- a/src/overlays/actors/ovl_En_Dns/z_en_dns.h
+++ b/src/overlays/actors/ovl_En_Dns/z_en_dns.h
@@ -58,7 +58,7 @@ typedef struct EnDns {
     /* 0x026C */ ColliderCylinder collider;
     /* 0x02B8 */ s16 dustTimer;
     /* 0x02BA */ u8 animIndex; // set but not read
-    /* 0x02BB */ u8 bumpOn;
+    /* 0x02BB */ u8 isColliderEnabled;
     /* 0x02BC */ u8 standOnGround;
     /* 0x02BD */ u8 dropCollectible;
     /* 0x02C0 */ DnsItemEntry* dnsItemEntry;
diff --git a/src/overlays/actors/ovl_En_Dnt_Jiji/z_en_dnt_jiji.c b/src/overlays/actors/ovl_En_Dnt_Jiji/z_en_dnt_jiji.c
index 59c8ed95d7..cfa1f2a32b 100644
--- a/src/overlays/actors/ovl_En_Dnt_Jiji/z_en_dnt_jiji.c
+++ b/src/overlays/actors/ovl_En_Dnt_Jiji/z_en_dnt_jiji.c
@@ -64,8 +64,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 30, 80, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Dnt_Nomal/z_en_dnt_nomal.c b/src/overlays/actors/ovl_En_Dnt_Nomal/z_en_dnt_nomal.c
index 4de5e81918..ff9f9cc71a 100644
--- a/src/overlays/actors/ovl_En_Dnt_Nomal/z_en_dnt_nomal.c
+++ b/src/overlays/actors/ovl_En_Dnt_Nomal/z_en_dnt_nomal.c
@@ -81,8 +81,8 @@ static ColliderCylinderInit sBodyCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 16, 46, 0, { 0, 0, 0 } },
@@ -101,8 +101,8 @@ static ColliderQuadInit sTargetQuadInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x0001F824, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -238,9 +238,9 @@ void EnDntNomal_TargetWait(EnDntNomal* this, PlayState* play) {
     if ((this->targetQuad.base.acFlags & AC_HIT) || BREG(0)) {
         this->targetQuad.base.acFlags &= ~AC_HIT;
 
-        dx = fabsf(targetX - this->targetQuad.elem.bumper.hitPos.x);
-        dy = fabsf(targetY - this->targetQuad.elem.bumper.hitPos.y);
-        dz = fabsf(targetZ - this->targetQuad.elem.bumper.hitPos.z);
+        dx = fabsf(targetX - this->targetQuad.elem.acDmgInfo.hitPos.x);
+        dy = fabsf(targetY - this->targetQuad.elem.acDmgInfo.hitPos.y);
+        dz = fabsf(targetZ - this->targetQuad.elem.acDmgInfo.hitPos.z);
 
         scoreVel.y = 5.0f;
 
diff --git a/src/overlays/actors/ovl_En_Dodojr/z_en_dodojr.c b/src/overlays/actors/ovl_En_Dodojr/z_en_dodojr.c
index e3f78aee65..f5f5940881 100644
--- a/src/overlays/actors/ovl_En_Dodojr/z_en_dodojr.c
+++ b/src/overlays/actors/ovl_En_Dodojr/z_en_dodojr.c
@@ -56,8 +56,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0xFFC5FFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 18, 20, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Dodongo/z_en_dodongo.c b/src/overlays/actors/ovl_En_Dodongo/z_en_dodongo.c
index e9a04f9efe..6ae9701d53 100644
--- a/src/overlays/actors/ovl_En_Dodongo/z_en_dodongo.c
+++ b/src/overlays/actors/ovl_En_Dodongo/z_en_dodongo.c
@@ -54,8 +54,8 @@ static ColliderJntSphElementInit sBodyElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 15, { { 0, 0, 0 }, 17 }, 100 },
@@ -65,8 +65,8 @@ static ColliderJntSphElementInit sBodyElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 14, { { 0, 0, 0 }, 15 }, 100 },
@@ -76,8 +76,8 @@ static ColliderJntSphElementInit sBodyElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 13, { { 0, 0, 0 }, 10 }, 100 },
@@ -87,8 +87,8 @@ static ColliderJntSphElementInit sBodyElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 21, { { 0, 0, 0 }, 20 }, 100 },
@@ -98,8 +98,8 @@ static ColliderJntSphElementInit sBodyElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 28, { { 0, 0, 0 }, 20 }, 100 },
@@ -109,8 +109,8 @@ static ColliderJntSphElementInit sBodyElementsInit[6] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x0D800691, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON | OCELEM_UNK3,
         },
         { 6, { { 0, 0, 0 }, 35 }, 100 },
@@ -136,8 +136,8 @@ static ColliderTrisElementInit sHardElementsInit[3] = {
             ELEMTYPE_UNK2,
             { 0x00000000, 0x00, 0x00 },
             { 0xF24BF96E, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE | BUMP_NO_AT_INFO,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE | ACELEM_NO_AT_INFO,
             OCELEM_NONE,
         },
         { { { -10.0f, 14.0f, 2.0f }, { -10.0f, -6.0f, 2.0f }, { 9.0f, 14.0f, 2.0f } } },
@@ -147,8 +147,8 @@ static ColliderTrisElementInit sHardElementsInit[3] = {
             ELEMTYPE_UNK2,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCBF96E, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE | BUMP_NO_AT_INFO,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE | ACELEM_NO_AT_INFO,
             OCELEM_NONE,
         },
         { { { -10.0f, -6.0f, 2.0f }, { 9.0f, -6.0f, 2.0f }, { 9.0f, 14.0f, 2.0f } } },
@@ -158,8 +158,8 @@ static ColliderTrisElementInit sHardElementsInit[3] = {
             ELEMTYPE_UNK2,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCBF96E, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE | BUMP_NO_AT_INFO,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE | ACELEM_NO_AT_INFO,
             OCELEM_NONE,
         },
         { { { -10.0f, -6.0f, 2.0f }, { 9.0f, -6.0f, 2.0f }, { 9.0f, 14.0f, 2.0f } } },
@@ -192,8 +192,8 @@ static ColliderQuadInit sAttackQuadInit = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x01, 0x10 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL | TOUCH_UNK7,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL | ATELEM_UNK7,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -605,13 +605,13 @@ void EnDodongo_SweepTail(EnDodongo* this, PlayState* play) {
 
     if (SkelAnime_Update(&this->skelAnime)) {
         if ((this->timer != 0) || (ABS(yawDiff1) < 0x4000)) {
-            this->sphElements[2].base.toucherFlags = TOUCH_NONE;
-            this->sphElements[1].base.toucherFlags = TOUCH_NONE;
+            this->sphElements[2].base.atElemFlags = ATELEM_NONE;
+            this->sphElements[1].base.atElemFlags = ATELEM_NONE;
             this->colliderBody.base.atFlags = AT_NONE;
-            this->sphElements[2].base.toucher.dmgFlags = 0;
-            this->sphElements[1].base.toucher.dmgFlags = 0;
-            this->sphElements[2].base.toucher.damage = 0;
-            this->sphElements[1].base.toucher.damage = 0;
+            this->sphElements[2].base.atDmgInfo.dmgFlags = 0;
+            this->sphElements[1].base.atDmgInfo.dmgFlags = 0;
+            this->sphElements[2].base.atDmgInfo.damage = 0;
+            this->sphElements[1].base.atDmgInfo.damage = 0;
             EnDodongo_SetupBreatheFire(this);
             this->timer = Rand_S16Offset(5, 10);
         } else {
@@ -628,10 +628,10 @@ void EnDodongo_SweepTail(EnDodongo* this, PlayState* play) {
             Actor_PlaySfx(&this->actor, NA_SE_EN_DODO_J_TAIL);
             Animation_PlayOnceSetSpeed(&this->skelAnime, animation, 2.0f);
             this->timer = 18;
-            this->colliderBody.base.atFlags = this->sphElements[1].base.toucherFlags =
-                this->sphElements[2].base.toucherFlags = AT_ON | AT_TYPE_ENEMY; // also TOUCH_ON | TOUCH_SFX_WOOD
-            this->sphElements[1].base.toucher.dmgFlags = this->sphElements[2].base.toucher.dmgFlags = DMG_DEFAULT;
-            this->sphElements[1].base.toucher.damage = this->sphElements[2].base.toucher.damage = 8;
+            this->colliderBody.base.atFlags = this->sphElements[1].base.atElemFlags =
+                this->sphElements[2].base.atElemFlags = AT_ON | AT_TYPE_ENEMY; // also ATELEM_ON | ATELEM_SFX_WOOD
+            this->sphElements[1].base.atDmgInfo.dmgFlags = this->sphElements[2].base.atDmgInfo.dmgFlags = DMG_DEFAULT;
+            this->sphElements[1].base.atDmgInfo.damage = this->sphElements[2].base.atDmgInfo.damage = 8;
         }
     } else if (this->timer > 1) {
         Vec3f tailPos;
diff --git a/src/overlays/actors/ovl_En_Dog/z_en_dog.c b/src/overlays/actors/ovl_En_Dog/z_en_dog.c
index ab7e624862..be4c04dd9e 100644
--- a/src/overlays/actors/ovl_En_Dog/z_en_dog.c
+++ b/src/overlays/actors/ovl_En_Dog/z_en_dog.c
@@ -46,8 +46,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 16, 20, 0, { 0 } },
diff --git a/src/overlays/actors/ovl_En_Du/z_en_du.c b/src/overlays/actors/ovl_En_Du/z_en_du.c
index 56ec047023..65f4b90bf6 100644
--- a/src/overlays/actors/ovl_En_Du/z_en_du.c
+++ b/src/overlays/actors/ovl_En_Du/z_en_du.c
@@ -47,8 +47,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Eiyer/z_en_eiyer.c b/src/overlays/actors/ovl_En_Eiyer/z_en_eiyer.c
index 099dc5b29a..ebfa1c6e11 100644
--- a/src/overlays/actors/ovl_En_Eiyer/z_en_eiyer.c
+++ b/src/overlays/actors/ovl_En_Eiyer/z_en_eiyer.c
@@ -60,8 +60,8 @@ static ColliderCylinderInit sColCylInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x04, 0x08 },
         { 0x00000019, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_HARD,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_HARD,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 27, 17, -10, { 0, 0, 0 } },
@@ -178,7 +178,7 @@ void EnEiyer_RotateAroundHome(EnEiyer* this) {
 }
 
 void EnEiyer_SetupAppearFromGround(EnEiyer* this) {
-    this->collider.elem.bumper.dmgFlags = DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT;
+    this->collider.elem.acDmgInfo.dmgFlags = DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT;
     Animation_PlayLoop(&this->skelanime, &gStingerIdleAnim);
 
     this->actor.world.pos.x = this->actor.home.pos.x;
@@ -228,7 +228,7 @@ void EnEiyer_SetupInactive(EnEiyer* this) {
 void EnEiyer_SetupAmbush(EnEiyer* this, PlayState* play) {
     this->actor.speed = 0.0f;
     Animation_PlayOnce(&this->skelanime, &gStingerBackflipAnim);
-    this->collider.elem.bumper.dmgFlags = DMG_DEFAULT;
+    this->collider.elem.acDmgInfo.dmgFlags = DMG_DEFAULT;
     this->basePos = this->actor.world.pos;
     this->actor.world.rot.y = this->actor.shape.rot.y;
     this->actor.flags |= ACTOR_FLAG_IGNORE_QUAKE;
@@ -290,14 +290,14 @@ void EnEiyer_SetupDie(EnEiyer* this) {
     this->timer = 20;
     Actor_SetColorFilter(&this->actor, COLORFILTER_COLORFLAG_RED, 200, COLORFILTER_BUFFLAG_OPA, 40);
 
-    if (this->collider.elem.bumper.dmgFlags != (DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT)) {
+    if (this->collider.elem.acDmgInfo.dmgFlags != (DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT)) {
         this->actor.speed = 6.0f;
         Animation_MorphToLoop(&this->skelanime, &gStingerHitAnim, -3.0f);
     } else {
         this->actor.speed -= 6.0f;
     }
 
-    this->collider.elem.bumper.dmgFlags = DMG_DEFAULT;
+    this->collider.elem.acDmgInfo.dmgFlags = DMG_DEFAULT;
     this->collider.base.atFlags &= ~AT_ON;
     this->collider.base.acFlags &= ~AC_ON;
     this->actionFunc = EnEiyer_Die;
@@ -612,7 +612,7 @@ void EnEiyer_UpdateDamage(EnEiyer* this, PlayState* play) {
             }
 
             // If underground, one hit kill
-            if (this->collider.elem.bumper.dmgFlags == (DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT)) {
+            if (this->collider.elem.acDmgInfo.dmgFlags == (DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT)) {
                 if (this->actor.colChkInfo.damage == 0) {
                     EnEiyer_SetupAmbush(this, play);
                 } else {
@@ -687,7 +687,7 @@ s32 EnEiyer_OverrideLimbDraw(PlayState* play, s32 limbIndex, Gfx** dList, Vec3f*
         pos->z += 2500.0f;
     }
 
-    if (this->collider.elem.bumper.dmgFlags == (DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT) && limbIndex != 9 &&
+    if (this->collider.elem.acDmgInfo.dmgFlags == (DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT) && limbIndex != 9 &&
         limbIndex != 10) {
         *dList = NULL;
     }
diff --git a/src/overlays/actors/ovl_En_Fd/z_en_fd.c b/src/overlays/actors/ovl_En_Fd/z_en_fd.c
index 886680a57f..fe2eadd287 100644
--- a/src/overlays/actors/ovl_En_Fd/z_en_fd.c
+++ b/src/overlays/actors/ovl_En_Fd/z_en_fd.c
@@ -48,8 +48,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040088, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON | BUMP_HOOKABLE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON | ACELEM_HOOKABLE,
             OCELEM_ON,
         },
         { 21, { { 1600, 0, 0 }, 5 }, 300 },
@@ -59,8 +59,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 12, { { 1600, 0, 0 }, 5 }, 400 },
@@ -70,8 +70,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 14, { { 800, 0, 0 }, 4 }, 300 },
@@ -81,8 +81,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 15, { { 1600, 0, 0 }, 4 }, 300 },
@@ -92,8 +92,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 16, { { 2000, 0, 0 }, 4 }, 300 },
@@ -103,8 +103,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 17, { { 800, 0, 0 }, 4 }, 300 },
@@ -114,8 +114,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 18, { { 1600, 0, 0 }, 4 }, 300 },
@@ -125,8 +125,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 19, { { 2000, 0, 0 }, 4 }, 300 },
@@ -136,8 +136,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 4, { { 2200, 0, 0 }, 4 }, 400 },
@@ -147,8 +147,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 4, { { 5000, 0, 0 }, 4 }, 300 },
@@ -158,8 +158,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 8, { { 2200, 0, 0 }, 4 }, 400 },
@@ -169,8 +169,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x04 },
             { 0x00040008, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 8, { { 5000, 0, 0 }, 4 }, 300 },
@@ -283,7 +283,7 @@ s32 EnFd_ColliderCheck(EnFd* this, PlayState* play) {
             return false;
         }
         elem = &this->collider.elements[0].base;
-        if (elem->acHitElem != NULL && (elem->acHitElem->toucher.dmgFlags & DMG_HOOKSHOT)) {
+        if (elem->acHitElem != NULL && (elem->acHitElem->atDmgInfo.dmgFlags & DMG_HOOKSHOT)) {
             return false;
         }
 
diff --git a/src/overlays/actors/ovl_En_Fd_Fire/z_en_fd_fire.c b/src/overlays/actors/ovl_En_Fd_Fire/z_en_fd_fire.c
index 6f836144ec..d15f8c58aa 100644
--- a/src/overlays/actors/ovl_En_Fd_Fire/z_en_fd_fire.c
+++ b/src/overlays/actors/ovl_En_Fd_Fire/z_en_fd_fire.c
@@ -37,8 +37,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x01, 0x08 },
         { 0x0D840008, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 12, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Fhg_Fire/z_en_fhg_fire.c b/src/overlays/actors/ovl_En_Fhg_Fire/z_en_fhg_fire.c
index e079c8194e..8d0a8f2a63 100644
--- a/src/overlays/actors/ovl_En_Fhg_Fire/z_en_fhg_fire.c
+++ b/src/overlays/actors/ovl_En_Fhg_Fire/z_en_fhg_fire.c
@@ -69,8 +69,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK6,
         { 0x00100700, 0x03, 0x20 },
         { 0x0D900700, 0x00, 0x00 },
-        TOUCH_ON,
-        BUMP_ON,
+        ATELEM_ON,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 30, 10, { 0, 0, 0 } },
@@ -491,7 +491,7 @@ void EnFhgFire_EnergyBall(EnFhgFire* this, PlayState* play) {
                                                         (s16)(Rand_ZeroOne() * 25.0f) + 50, FHGFLASH_LIGHTBALL_GREEN);
                     }
                     canBottleReflect2 = canBottleReflect1;
-                    if (!canBottleReflect2 && (acHitElem->toucher.dmgFlags & DMG_SHIELD)) {
+                    if (!canBottleReflect2 && (acHitElem->atDmgInfo.dmgFlags & DMG_SHIELD)) {
                         killMode = BALL_IMPACT;
                         Audio_PlaySfxGeneral(NA_SE_IT_SHIELD_REFLECT_MG, &player->actor.projectedPos, 4,
                                              &gSfxDefaultFreqAndVolScale, &gSfxDefaultFreqAndVolScale,
diff --git a/src/overlays/actors/ovl_En_Fire_Rock/z_en_fire_rock.c b/src/overlays/actors/ovl_En_Fire_Rock/z_en_fire_rock.c
index a065a4c040..32d28a0074 100644
--- a/src/overlays/actors/ovl_En_Fire_Rock/z_en_fire_rock.c
+++ b/src/overlays/actors/ovl_En_Fire_Rock/z_en_fire_rock.c
@@ -40,8 +40,8 @@ static ColliderCylinderInit D_80A12CA0 = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x09, 0x08 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 30, 30, -10, { 0, 0, 0 } },
@@ -60,8 +60,8 @@ static ColliderCylinderInit D_80A12CCC = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x01, 0x08 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 30, 30, -10, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Firefly/z_en_firefly.c b/src/overlays/actors/ovl_En_Firefly/z_en_firefly.c
index 5fe572eb0b..760140aed5 100644
--- a/src/overlays/actors/ovl_En_Firefly/z_en_firefly.c
+++ b/src/overlays/actors/ovl_En_Firefly/z_en_firefly.c
@@ -52,8 +52,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x01, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_HARD,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_HARD,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 1, { { 0, 1000, 0 }, 15 }, 100 },
@@ -118,7 +118,7 @@ static InitChainEntry sInitChain[] = {
 
 void EnFirefly_Extinguish(EnFirefly* this) {
     this->actor.params += 2;
-    this->collider.elements[0].base.toucher.effect = 0; // None
+    this->collider.elements[0].base.atDmgInfo.effect = 0; // None
     this->auraType = KEESE_AURA_NONE;
     this->onFire = false;
     this->actor.naviEnemyId = NAVI_ENEMY_KEESE;
@@ -130,7 +130,7 @@ void EnFirefly_Ignite(EnFirefly* this) {
     } else {
         this->actor.params -= 2;
     }
-    this->collider.elements[0].base.toucher.effect = 1; // Fire
+    this->collider.elements[0].base.atDmgInfo.effect = 1; // Fire
     this->auraType = KEESE_AURA_FIRE;
     this->onFire = true;
     this->actor.naviEnemyId = NAVI_ENEMY_FIRE_KEESE;
@@ -174,10 +174,10 @@ void EnFirefly_Init(Actor* thisx, PlayState* play) {
         }
 
         if (this->actor.params == KEESE_ICE_FLY) {
-            this->collider.elements[0].base.toucher.effect = 2; // Ice
+            this->collider.elements[0].base.atDmgInfo.effect = 2; // Ice
             this->actor.naviEnemyId = NAVI_ENEMY_ICE_KEESE;
         } else {
-            this->collider.elements[0].base.toucher.effect = 0; // Nothing
+            this->collider.elements[0].base.atDmgInfo.effect = 0; // Nothing
             this->actor.naviEnemyId = NAVI_ENEMY_KEESE;
         }
 
diff --git a/src/overlays/actors/ovl_En_Fish/z_en_fish.c b/src/overlays/actors/ovl_En_Fish/z_en_fish.c
index 1ebc39c90a..e008be1d2d 100644
--- a/src/overlays/actors/ovl_En_Fish/z_en_fish.c
+++ b/src/overlays/actors/ovl_En_Fish/z_en_fish.c
@@ -43,8 +43,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 5 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Floormas/z_en_floormas.c b/src/overlays/actors/ovl_En_Floormas/z_en_floormas.c
index e1ed9d58e1..41dd2cfdc5 100644
--- a/src/overlays/actors/ovl_En_Floormas/z_en_floormas.c
+++ b/src/overlays/actors/ovl_En_Floormas/z_en_floormas.c
@@ -69,8 +69,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x04, 0x10 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_HARD,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_ON | ATELEM_SFX_HARD,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 25, 40, 0, { 0, 0, 0 } },
@@ -292,7 +292,7 @@ void EnFloormas_SetupSplit(EnFloormas* this) {
                      ANIMMODE_ONCE, 0.0f);
     this->collider.dim.radius = sCylinderInit.dim.radius * 0.6f;
     this->collider.dim.height = sCylinderInit.dim.height * 0.6f;
-    this->collider.elem.bumperFlags &= ~BUMP_HOOKABLE;
+    this->collider.elem.acElemFlags &= ~ACELEM_HOOKABLE;
     this->actor.speed = 4.0f;
     this->actor.velocity.y = 7.0f;
     // using div creates a signed check.
@@ -389,7 +389,7 @@ void EnFloormas_SetupSmallWait(EnFloormas* this) {
 
 void EnFloormas_SetupTakeDamage(EnFloormas* this) {
     Animation_MorphToPlayOnce(&this->skelAnime, &gWallmasterDamageAnim, -3.0f);
-    if (this->collider.elem.acHitElem->toucher.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT)) {
+    if (this->collider.elem.acHitElem->atDmgInfo.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT)) {
         this->actor.world.rot.y = this->collider.base.ac->world.rot.y;
     } else {
         this->actor.world.rot.y = Actor_WorldYawTowardActor(&this->actor, this->collider.base.ac) + 0x8000;
@@ -914,7 +914,7 @@ void EnFloormas_Merge(EnFloormas* this, PlayState* play) {
             this->actor.flags &= ~ACTOR_FLAG_4;
             EnFloormas_MakeVulnerable(this);
             this->actor.params = 0;
-            this->collider.elem.bumperFlags |= BUMP_HOOKABLE;
+            this->collider.elem.acElemFlags |= ACELEM_HOOKABLE;
             this->actor.colChkInfo.health = sColChkInfoInit.health;
             EnFloormas_SetupStand(this);
         } else {
@@ -985,7 +985,7 @@ void EnFloormas_ColliderCheck(EnFloormas* this, PlayState* play) {
                 if (this->actor.scale.x < 0.01f) {
                     isSmall = true;
                 }
-                if (isSmall && this->collider.elem.acHitElem->toucher.dmgFlags & DMG_HOOKSHOT) {
+                if (isSmall && this->collider.elem.acHitElem->atDmgInfo.dmgFlags & DMG_HOOKSHOT) {
                     this->actor.colChkInfo.damage = 2;
                     this->actor.colChkInfo.damageEffect = 0;
                 }
diff --git a/src/overlays/actors/ovl_En_Fu/z_en_fu.c b/src/overlays/actors/ovl_En_Fu/z_en_fu.c
index aac5b16ae8..9f10084857 100644
--- a/src/overlays/actors/ovl_En_Fu/z_en_fu.c
+++ b/src/overlays/actors/ovl_En_Fu/z_en_fu.c
@@ -53,8 +53,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Fw/z_en_fw.c b/src/overlays/actors/ovl_En_Fw/z_en_fw.c
index 57b04ae52c..4170af674d 100644
--- a/src/overlays/actors/ovl_En_Fw/z_en_fw.c
+++ b/src/overlays/actors/ovl_En_Fw/z_en_fw.c
@@ -42,8 +42,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x04 },
             { 0xFFCFFFFE, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE,
             OCELEM_ON,
         },
         { 2, { { 1200, 0, 0 }, 16 }, 100 },
@@ -139,7 +139,7 @@ s32 EnFw_CheckCollider(EnFw* this, PlayState* play) {
 
     if (this->collider.base.acFlags & AC_HIT) {
         elem = &this->collider.elements[0].base;
-        if (elem->acHitElem->toucher.dmgFlags & DMG_HOOKSHOT) {
+        if (elem->acHitElem->atDmgInfo.dmgFlags & DMG_HOOKSHOT) {
             this->lastDmgHook = true;
         } else {
             this->lastDmgHook = false;
diff --git a/src/overlays/actors/ovl_En_Fz/z_en_fz.c b/src/overlays/actors/ovl_En_Fz/z_en_fz.c
index 64ae25bba1..3e4b6ec492 100644
--- a/src/overlays/actors/ovl_En_Fz/z_en_fz.c
+++ b/src/overlays/actors/ovl_En_Fz/z_en_fz.c
@@ -69,8 +69,8 @@ static ColliderCylinderInitType1 sCylinderInit1 = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x00 },
         { 0xFFCE0FDB, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 30, 80, 0, { 0, 0, 0 } },
@@ -88,8 +88,8 @@ static ColliderCylinderInitType1 sCylinderInit2 = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x00 },
         { 0x0001F024, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 35, 80, 0, { 0, 0, 0 } },
@@ -107,8 +107,8 @@ static ColliderCylinderInitType1 sCylinderInit3 = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x02, 0x08 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { 20, 30, -15, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_G_Switch/z_en_g_switch.c b/src/overlays/actors/ovl_En_G_Switch/z_en_g_switch.c
index 50e69b64ec..dd5ad3b499 100644
--- a/src/overlays/actors/ovl_En_G_Switch/z_en_g_switch.c
+++ b/src/overlays/actors/ovl_En_G_Switch/z_en_g_switch.c
@@ -52,8 +52,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK2,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 13, 40, 0, { 0, 0, 0 } },
@@ -137,7 +137,7 @@ void EnGSwitch_Init(Actor* thisx, PlayState* play) {
             this->actor.scale.x = 0.25f;
             this->actor.scale.y = 0.45f;
             this->actor.scale.z = 0.25f;
-            this->collider.elem.bumper.dmgFlags = DMG_ARROW;
+            this->collider.elem.acDmgInfo.dmgFlags = DMG_ARROW;
             this->objectId = OBJECT_TSUBO;
             this->requiredObjectSlot = Object_GetSlot(&play->objectCtx, this->objectId);
             if (this->requiredObjectSlot < 0) {
@@ -183,9 +183,9 @@ void EnGSwitch_Break(EnGSwitch* this, PlayState* play) {
     randPos.x = this->actor.world.pos.x + Rand_CenteredFloat(40.0f);
     randPos.y = this->actor.world.pos.y + 30.0f + Rand_CenteredFloat(35.0f);
     randPos.z = this->actor.world.pos.z + Rand_CenteredFloat(40.0f);
-    hitPos.x = this->collider.elem.bumper.hitPos.x;
-    hitPos.y = this->collider.elem.bumper.hitPos.y;
-    hitPos.z = this->collider.elem.bumper.hitPos.z;
+    hitPos.x = this->collider.elem.acDmgInfo.hitPos.x;
+    hitPos.y = this->collider.elem.acDmgInfo.hitPos.y;
+    hitPos.z = this->collider.elem.acDmgInfo.hitPos.z;
     EffectSsHitMark_SpawnCustomScale(play, EFFECT_HITMARK_WHITE, 700, &hitPos);
     if (this->type == ENGSWITCH_ARCHERY_POT) {
         velocity.y = 15.0f;
diff --git a/src/overlays/actors/ovl_En_Gb/z_en_gb.c b/src/overlays/actors/ovl_En_Gb/z_en_gb.c
index aafcf0d06c..ad08fbdace 100644
--- a/src/overlays/actors/ovl_En_Gb/z_en_gb.c
+++ b/src/overlays/actors/ovl_En_Gb/z_en_gb.c
@@ -56,8 +56,8 @@ static ColliderCylinderInitType1 sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 40, 75, 0, { 0, 0, 0 } },
@@ -76,8 +76,8 @@ static ColliderCylinderInitType1 sBottlesCylindersInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 4, 20, 0, { 0, 0, 0 } },
@@ -94,8 +94,8 @@ static ColliderCylinderInitType1 sBottlesCylindersInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 4, 20, 0, { 0, 0, 0 } },
@@ -112,8 +112,8 @@ static ColliderCylinderInitType1 sBottlesCylindersInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 10, 20, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Ge1/z_en_ge1.c b/src/overlays/actors/ovl_En_Ge1/z_en_ge1.c
index cbd0d72844..405cfc0664 100644
--- a/src/overlays/actors/ovl_En_Ge1/z_en_ge1.c
+++ b/src/overlays/actors/ovl_En_Ge1/z_en_ge1.c
@@ -64,8 +64,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000702, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Ge2/z_en_ge2.c b/src/overlays/actors/ovl_En_Ge2/z_en_ge2.c
index e1317e5ba9..40b2b9df58 100644
--- a/src/overlays/actors/ovl_En_Ge2/z_en_ge2.c
+++ b/src/overlays/actors/ovl_En_Ge2/z_en_ge2.c
@@ -80,8 +80,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x000007A2, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 60, 0, { 0, 0, 0 } },
@@ -556,7 +556,7 @@ void EnGe2_Update(Actor* thisx, PlayState* play) {
         this->actionFunc(this, play);
     } else if (this->collider.base.acFlags & AC_HIT) {
         if ((this->collider.elem.acHitElem != NULL) &&
-            (this->collider.elem.acHitElem->toucher.dmgFlags & DMG_HOOKSHOT)) {
+            (this->collider.elem.acHitElem->atDmgInfo.dmgFlags & DMG_HOOKSHOT)) {
             //! @bug duration parameter is larger than 255 which messes with the internal bitpacking of the colorfilter.
             //! Because of the duration being tracked as an unsigned byte it ends up being truncated to 144
             Actor_SetColorFilter(&this->actor, COLORFILTER_COLORFLAG_BLUE, 120, COLORFILTER_BUFFLAG_OPA, 400);
@@ -607,8 +607,9 @@ void EnGe2_UpdateStunned(Actor* thisx, PlayState* play2) {
     CollisionCheck_SetOC(play, &play->colChkCtx, &this->collider.base);
     Actor_UpdateBgCheckInfo(play, &this->actor, 40.0f, 25.0f, 40.0f, UPDBGCHECKINFO_FLAG_0 | UPDBGCHECKINFO_FLAG_2);
 
-    if ((this->collider.base.acFlags & AC_HIT) && ((this->collider.elem.acHitElem == NULL) ||
-                                                   !(this->collider.elem.acHitElem->toucher.dmgFlags & DMG_HOOKSHOT))) {
+    if ((this->collider.base.acFlags & AC_HIT) &&
+        ((this->collider.elem.acHitElem == NULL) ||
+         !(this->collider.elem.acHitElem->atDmgInfo.dmgFlags & DMG_HOOKSHOT))) {
         this->actor.colorFilterTimer = 0;
         EnGe2_ChangeAction(this, GE2_ACTION_KNOCKEDOUT);
         this->timer = 100;
diff --git a/src/overlays/actors/ovl_En_Ge3/z_en_ge3.c b/src/overlays/actors/ovl_En_Ge3/z_en_ge3.c
index 0f3e0d480e..df33dc59e3 100644
--- a/src/overlays/actors/ovl_En_Ge3/z_en_ge3.c
+++ b/src/overlays/actors/ovl_En_Ge3/z_en_ge3.c
@@ -43,8 +43,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000722, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 50, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_GeldB/z_en_geldb.c b/src/overlays/actors/ovl_En_GeldB/z_en_geldb.c
index ba58e9dbdd..8ef486c42c 100644
--- a/src/overlays/actors/ovl_En_GeldB/z_en_geldb.c
+++ b/src/overlays/actors/ovl_En_GeldB/z_en_geldb.c
@@ -94,8 +94,8 @@ static ColliderCylinderInit sBodyCylInit = {
         ELEMTYPE_UNK1,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 50, 0, { 0, 0, 0 } },
@@ -107,8 +107,8 @@ static ColliderTrisElementInit sBlockTrisElementsInit[2] = {
             ELEMTYPE_UNK2,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFC1FFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { -10.0f, 14.0f, 2.0f }, { -10.0f, -6.0f, 2.0f }, { 9.0f, 14.0f, 2.0f } } },
@@ -118,8 +118,8 @@ static ColliderTrisElementInit sBlockTrisElementsInit[2] = {
             ELEMTYPE_UNK2,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFC1FFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { -10.0f, -6.0f, 2.0f }, { 9.0f, -6.0f, 2.0f }, { 9.0f, 14.0f, 2.0f } } },
@@ -152,8 +152,8 @@ static ColliderQuadInit sSwordQuadInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL | TOUCH_UNK7,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL | ATELEM_UNK7,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_En_Gm/z_en_gm.c b/src/overlays/actors/ovl_En_Gm/z_en_gm.c
index c0ee8b7cf8..46f0a2ec00 100644
--- a/src/overlays/actors/ovl_En_Gm/z_en_gm.c
+++ b/src/overlays/actors/ovl_En_Gm/z_en_gm.c
@@ -50,8 +50,8 @@ static ColliderCylinderInitType1 sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 100, 120, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Go/z_en_go.c b/src/overlays/actors/ovl_En_Go/z_en_go.c
index 3ff17461fa..f648a2f910 100644
--- a/src/overlays/actors/ovl_En_Go/z_en_go.c
+++ b/src/overlays/actors/ovl_En_Go/z_en_go.c
@@ -59,8 +59,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Go2/z_en_go2.c b/src/overlays/actors/ovl_En_Go2/z_en_go2.c
index 278c4679dd..b5b699676e 100644
--- a/src/overlays/actors/ovl_En_Go2/z_en_go2.c
+++ b/src/overlays/actors/ovl_En_Go2/z_en_go2.c
@@ -85,8 +85,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000008, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 40, 65, 0, { 0, 0, 0 } },
@@ -1344,7 +1344,7 @@ void EnGo2_GetItemAnimation(EnGo2* this, PlayState* play) {
 
 void EnGo2_SetupRolling(EnGo2* this, PlayState* play) {
     if ((this->actor.params & 0x1F) == GORON_CITY_ROLLING_BIG || (this->actor.params & 0x1F) == GORON_CITY_LINK) {
-        this->collider.elem.bumperFlags = BUMP_ON;
+        this->collider.elem.acElemFlags = ACELEM_ON;
         this->actor.speed = GET_INFTABLE(INFTABLE_11E) ? 6.0f : 3.6000001f;
     } else {
         this->actor.speed = 6.0f;
@@ -1368,7 +1368,7 @@ void EnGo2_StopRolling(EnGo2* this, PlayState* play) {
             }
         }
     } else {
-        this->collider.elem.bumperFlags = BUMP_NONE;
+        this->collider.elem.acElemFlags = ACELEM_NONE;
     }
 
     this->actor.shape.rot = this->actor.world.rot;
diff --git a/src/overlays/actors/ovl_En_Goma/z_en_goma.c b/src/overlays/actors/ovl_En_Goma/z_en_goma.c
index 14a22e3408..1734511c51 100644
--- a/src/overlays/actors/ovl_En_Goma/z_en_goma.c
+++ b/src/overlays/actors/ovl_En_Goma/z_en_goma.c
@@ -67,8 +67,8 @@ static ColliderCylinderInit D_80A4B7A0 = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0xFFDFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 15, 30, 10, { 0, 0, 0 } },
@@ -87,8 +87,8 @@ static ColliderCylinderInit D_80A4B7CC = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0xFFDFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 15, 30, 10, { 0, 0, 0 } },
@@ -623,7 +623,7 @@ void EnGoma_UpdateHit(EnGoma* this, PlayState* play) {
             this->colCyl2.base.acFlags &= ~AC_HIT;
 
             if (this->gomaType == ENGOMA_NORMAL) {
-                u32 dmgFlags = acHitElem->toucher.dmgFlags;
+                u32 dmgFlags = acHitElem->atDmgInfo.dmgFlags;
 
                 if (dmgFlags & DMG_SHIELD) {
                     if (this->actionFunc == EnGoma_Jump) {
diff --git a/src/overlays/actors/ovl_En_Goroiwa/z_en_goroiwa.c b/src/overlays/actors/ovl_En_Goroiwa/z_en_goroiwa.c
index 59068e93d6..23df326169 100644
--- a/src/overlays/actors/ovl_En_Goroiwa/z_en_goroiwa.c
+++ b/src/overlays/actors/ovl_En_Goroiwa/z_en_goroiwa.c
@@ -61,8 +61,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x20000000, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 58 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Gs/z_en_gs.c b/src/overlays/actors/ovl_En_Gs/z_en_gs.c
index 3964881ebe..d367633af6 100644
--- a/src/overlays/actors/ovl_En_Gs/z_en_gs.c
+++ b/src/overlays/actors/ovl_En_Gs/z_en_gs.c
@@ -46,8 +46,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 21, 48, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Hata/z_en_hata.c b/src/overlays/actors/ovl_En_Hata/z_en_hata.c
index 4e80c5a5a1..dcf9aca99b 100644
--- a/src/overlays/actors/ovl_En_Hata/z_en_hata.c
+++ b/src/overlays/actors/ovl_En_Hata/z_en_hata.c
@@ -40,8 +40,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000080, 0x00, 0x00 },
-        TOUCH_NONE | TOUCH_SFX_NORMAL,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_NONE | ATELEM_SFX_NORMAL,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 16, 246, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Heishi2/z_en_heishi2.c b/src/overlays/actors/ovl_En_Heishi2/z_en_heishi2.c
index 7255fba4aa..762fa5d6c6 100644
--- a/src/overlays/actors/ovl_En_Heishi2/z_en_heishi2.c
+++ b/src/overlays/actors/ovl_En_Heishi2/z_en_heishi2.c
@@ -75,8 +75,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 33, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Heishi3/z_en_heishi3.c b/src/overlays/actors/ovl_En_Heishi3/z_en_heishi3.c
index 1f33fb4b47..c38744ea2b 100644
--- a/src/overlays/actors/ovl_En_Heishi3/z_en_heishi3.c
+++ b/src/overlays/actors/ovl_En_Heishi3/z_en_heishi3.c
@@ -50,8 +50,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 15, 70, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Heishi4/z_en_heishi4.c b/src/overlays/actors/ovl_En_Heishi4/z_en_heishi4.c
index 691f0bb641..373d28ca90 100644
--- a/src/overlays/actors/ovl_En_Heishi4/z_en_heishi4.c
+++ b/src/overlays/actors/ovl_En_Heishi4/z_en_heishi4.c
@@ -48,8 +48,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 33, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Hintnuts/z_en_hintnuts.c b/src/overlays/actors/ovl_En_Hintnuts/z_en_hintnuts.c
index c9007ebd9b..08468d132b 100644
--- a/src/overlays/actors/ovl_En_Hintnuts/z_en_hintnuts.c
+++ b/src/overlays/actors/ovl_En_Hintnuts/z_en_hintnuts.c
@@ -52,8 +52,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 18, 32, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Honotrap/z_en_honotrap.c b/src/overlays/actors/ovl_En_Honotrap/z_en_honotrap.c
index 5b9ecb2213..8e3a20b269 100644
--- a/src/overlays/actors/ovl_En_Honotrap/z_en_honotrap.c
+++ b/src/overlays/actors/ovl_En_Honotrap/z_en_honotrap.c
@@ -66,8 +66,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK4,
             { 0x00000000, 0x00, 0x00 },
             { 0x0001F824, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 0.0f, 23.0f, 8.5f }, { -23.0f, 0.0f, 8.5f }, { 0.0f, -23.0f, 8.5f } } },
@@ -77,8 +77,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x0001F824, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 0.0f, 23.0f, 8.5f }, { 0.0f, -23.0f, 8.5f }, { 23.0f, 0.0f, 8.5f } } },
@@ -111,8 +111,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x01, 0x04 },
         { 0x00100000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 10, 25, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Horse/z_en_horse.c b/src/overlays/actors/ovl_En_Horse/z_en_horse.c
index 20324e670a..43937fd02a 100644
--- a/src/overlays/actors/ovl_En_Horse/z_en_horse.c
+++ b/src/overlays/actors/ovl_En_Horse/z_en_horse.c
@@ -91,8 +91,8 @@ static ColliderCylinderInit sCylinderInit1 = {
         ELEMTYPE_UNK0,
         { 0x00000400, 0x00, 0x04 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 70, 0, { 0, 0, 0 } },
@@ -111,8 +111,8 @@ static ColliderCylinderInit sCylinderInit2 = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 70, 0, { 0, 0, 0 } },
@@ -124,8 +124,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x0001F824, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_NO_AT_INFO | BUMP_NO_DAMAGE | BUMP_NO_SWORD_SFX | BUMP_NO_HITMARK,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_NO_AT_INFO | ACELEM_NO_DAMAGE | ACELEM_NO_SWORD_SFX | ACELEM_NO_HITMARK,
             OCELEM_ON,
         },
         { 13, { { 0, 0, 0 }, 20 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Horse_Ganon/z_en_horse_ganon.c b/src/overlays/actors/ovl_En_Horse_Ganon/z_en_horse_ganon.c
index f8f6c79944..0b324c3089 100644
--- a/src/overlays/actors/ovl_En_Horse_Ganon/z_en_horse_ganon.c
+++ b/src/overlays/actors/ovl_En_Horse_Ganon/z_en_horse_ganon.c
@@ -55,8 +55,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 40, 100, 0, { 0, 0, 0 } },
@@ -68,8 +68,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 13, { { 0, 0, 0 }, 20 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Horse_Link_Child/z_en_horse_link_child.c b/src/overlays/actors/ovl_En_Horse_Link_Child/z_en_horse_link_child.c
index 2eedfd0b65..698a026306 100644
--- a/src/overlays/actors/ovl_En_Horse_Link_Child/z_en_horse_link_child.c
+++ b/src/overlays/actors/ovl_En_Horse_Link_Child/z_en_horse_link_child.c
@@ -48,8 +48,8 @@ static ColliderCylinderInitType1 sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 100, 0, { 0, 0, 0 } },
@@ -61,8 +61,8 @@ static ColliderJntSphElementInit sJntSphElementInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 13, { { 0, 0, 0 }, 10 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Horse_Normal/z_en_horse_normal.c b/src/overlays/actors/ovl_En_Horse_Normal/z_en_horse_normal.c
index 5b8aebc28b..443dcf15c3 100644
--- a/src/overlays/actors/ovl_En_Horse_Normal/z_en_horse_normal.c
+++ b/src/overlays/actors/ovl_En_Horse_Normal/z_en_horse_normal.c
@@ -70,8 +70,8 @@ static ColliderCylinderInit sCylinderInit1 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 40, 100, 0, { 0, 0, 0 } },
@@ -90,8 +90,8 @@ static ColliderCylinderInit sCylinderInit2 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 60, 100, 0, { 0, 0, 0 } },
@@ -103,8 +103,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 11, { { 0, 0, 0 }, 20 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Horse_Zelda/z_en_horse_zelda.c b/src/overlays/actors/ovl_En_Horse_Zelda/z_en_horse_zelda.c
index e3bd35ec39..e3da728e85 100644
--- a/src/overlays/actors/ovl_En_Horse_Zelda/z_en_horse_zelda.c
+++ b/src/overlays/actors/ovl_En_Horse_Zelda/z_en_horse_zelda.c
@@ -46,8 +46,8 @@ static ColliderCylinderInitType1 sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 40, 100, 0, { 0, 0, 0 } },
@@ -59,8 +59,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 13, { { 0, 0, 0 }, 20 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Hs/z_en_hs.c b/src/overlays/actors/ovl_En_Hs/z_en_hs.c
index 7fb650ef73..09b1da8dda 100644
--- a/src/overlays/actors/ovl_En_Hs/z_en_hs.c
+++ b/src/overlays/actors/ovl_En_Hs/z_en_hs.c
@@ -43,8 +43,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 40, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Hs2/z_en_hs2.c b/src/overlays/actors/ovl_En_Hs2/z_en_hs2.c
index 5d402a3c4f..d84e35c4ef 100644
--- a/src/overlays/actors/ovl_En_Hs2/z_en_hs2.c
+++ b/src/overlays/actors/ovl_En_Hs2/z_en_hs2.c
@@ -41,8 +41,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 40, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Hy/z_en_hy.c b/src/overlays/actors/ovl_En_Hy/z_en_hy.c
index 7394b7c5d4..37e0666f3e 100644
--- a/src/overlays/actors/ovl_En_Hy/z_en_hy.c
+++ b/src/overlays/actors/ovl_En_Hy/z_en_hy.c
@@ -57,8 +57,8 @@ static ColliderCylinderInit sColCylInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Ice_Hono/z_en_ice_hono.c b/src/overlays/actors/ovl_En_Ice_Hono/z_en_ice_hono.c
index 1528f2b20e..2a7e7006b0 100644
--- a/src/overlays/actors/ovl_En_Ice_Hono/z_en_ice_hono.c
+++ b/src/overlays/actors/ovl_En_Ice_Hono/z_en_ice_hono.c
@@ -49,8 +49,8 @@ static ColliderCylinderInit sCylinderInitCapturableFlame = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 25, 80, 0, { 0, 0, 0 } },
@@ -69,8 +69,8 @@ static ColliderCylinderInit sCylinderInitDroppedFlame = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 12, 60, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Ik/z_en_ik.c b/src/overlays/actors/ovl_En_Ik/z_en_ik.c
index cc8dabe251..da82e07253 100644
--- a/src/overlays/actors/ovl_En_Ik/z_en_ik.c
+++ b/src/overlays/actors/ovl_En_Ik/z_en_ik.c
@@ -78,8 +78,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_NONE,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 25, 80, 0, { 0, 0, 0 } },
@@ -91,8 +91,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK2,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFC3FFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_NO_AT_INFO,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_NO_AT_INFO,
             OCELEM_NONE,
         },
         { { { -10.0f, 14.0f, 2.0f }, { -10.0f, -6.0f, 2.0f }, { 9.0f, 14.0f, 2.0f } } },
@@ -102,8 +102,8 @@ static ColliderTrisElementInit sTrisElementsInit[2] = {
             ELEMTYPE_UNK2,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFC3FFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_NO_AT_INFO,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_NO_AT_INFO,
             OCELEM_NONE,
         },
         { { { -10.0f, -6.0f, 2.0f }, { 9.0f, -6.0f, 2.0f }, { 9.0f, 14.0f, 2.0f } } },
@@ -136,8 +136,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK0,
         { 0x20000000, 0x00, 0x40 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL | TOUCH_UNK7,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL | ATELEM_UNK7,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_En_In/z_en_in.c b/src/overlays/actors/ovl_En_In/z_en_in.c
index 7ffd182239..f41fd6fe1d 100644
--- a/src/overlays/actors/ovl_En_In/z_en_in.c
+++ b/src/overlays/actors/ovl_En_In/z_en_in.c
@@ -49,8 +49,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 18, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Insect/z_en_insect.c b/src/overlays/actors/ovl_En_Insect/z_en_insect.c
index 63d11a8b65..8d2bd997fc 100644
--- a/src/overlays/actors/ovl_En_Insect/z_en_insect.c
+++ b/src/overlays/actors/ovl_En_Insect/z_en_insect.c
@@ -60,8 +60,8 @@ static ColliderJntSphElementInit sColliderItemInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 5 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Ishi/z_en_ishi.c b/src/overlays/actors/ovl_En_Ishi/z_en_ishi.c
index c89b0aef0d..2fbcf5fe68 100644
--- a/src/overlays/actors/ovl_En_Ishi/z_en_ishi.c
+++ b/src/overlays/actors/ovl_En_Ishi/z_en_ishi.c
@@ -73,8 +73,8 @@ static ColliderCylinderInit sCylinderInits[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x4FC1FFFE, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 10, 18, -2, { 0, 0, 0 } },
@@ -92,8 +92,8 @@ static ColliderCylinderInit sCylinderInits[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x4FC1FFF6, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 55, 70, 0, { 0, 0, 0 } },
@@ -356,7 +356,7 @@ void EnIshi_Wait(EnIshi* this, PlayState* play) {
             EnIshi_SpawnBugs(this, play);
         }
     } else if ((this->collider.base.acFlags & AC_HIT) && (type == ROCK_SMALL) &&
-               this->collider.elem.acHitElem->toucher.dmgFlags & (DMG_HAMMER | DMG_EXPLOSIVE)) {
+               this->collider.elem.acHitElem->atDmgInfo.dmgFlags & (DMG_HAMMER | DMG_EXPLOSIVE)) {
         EnIshi_DropCollectible(this, play);
         SfxSource_PlaySfxAtFixedWorldPos(play, &this->actor.world.pos, sBreakSfxDurations[type], sBreakSfxIds[type]);
         sFragmentSpawnFuncs[type](this, play);
diff --git a/src/overlays/actors/ovl_En_It/z_en_it.c b/src/overlays/actors/ovl_En_It/z_en_it.c
index d12620916e..39c0a913d4 100644
--- a/src/overlays/actors/ovl_En_It/z_en_it.c
+++ b/src/overlays/actors/ovl_En_It/z_en_it.c
@@ -25,8 +25,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 40, 10, 0, { 0 } },
diff --git a/src/overlays/actors/ovl_En_Jj/z_en_jj.c b/src/overlays/actors/ovl_En_Jj/z_en_jj.c
index 8c6f997543..9162737dc4 100644
--- a/src/overlays/actors/ovl_En_Jj/z_en_jj.c
+++ b/src/overlays/actors/ovl_En_Jj/z_en_jj.c
@@ -59,8 +59,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000004, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 170, 150, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Js/z_en_js.c b/src/overlays/actors/ovl_En_Js/z_en_js.c
index 9f1766c904..667ebf7404 100644
--- a/src/overlays/actors/ovl_En_Js/z_en_js.c
+++ b/src/overlays/actors/ovl_En_Js/z_en_js.c
@@ -41,8 +41,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Kakasi/z_en_kakasi.c b/src/overlays/actors/ovl_En_Kakasi/z_en_kakasi.c
index e5913e48c4..0d7cd9d831 100644
--- a/src/overlays/actors/ovl_En_Kakasi/z_en_kakasi.c
+++ b/src/overlays/actors/ovl_En_Kakasi/z_en_kakasi.c
@@ -35,8 +35,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE | BUMP_HOOKABLE,
+        ATELEM_NONE,
+        ACELEM_NONE | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 20, 70, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Kakasi2/z_en_kakasi2.c b/src/overlays/actors/ovl_En_Kakasi2/z_en_kakasi2.c
index 5d6e3416a8..31b3b3d006 100644
--- a/src/overlays/actors/ovl_En_Kakasi2/z_en_kakasi2.c
+++ b/src/overlays/actors/ovl_En_Kakasi2/z_en_kakasi2.c
@@ -23,8 +23,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_NONE,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 20, 70, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Kakasi3/z_en_kakasi3.c b/src/overlays/actors/ovl_En_Kakasi3/z_en_kakasi3.c
index 37b536f0b0..669596dd81 100644
--- a/src/overlays/actors/ovl_En_Kakasi3/z_en_kakasi3.c
+++ b/src/overlays/actors/ovl_En_Kakasi3/z_en_kakasi3.c
@@ -39,8 +39,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_NONE,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 20, 70, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Kanban/z_en_kanban.c b/src/overlays/actors/ovl_En_Kanban/z_en_kanban.c
index bd5edc270c..dd9aecd4e4 100644
--- a/src/overlays/actors/ovl_En_Kanban/z_en_kanban.c
+++ b/src/overlays/actors/ovl_En_Kanban/z_en_kanban.c
@@ -100,8 +100,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 50, 5, { 0, 0, 0 } },
@@ -303,7 +303,7 @@ void EnKanban_Update(Actor* thisx, PlayState* play2) {
                     s16 yawDiff = this->actor.yawTowardsPlayer - this->actor.shape.rot.y;
                     u8 i;
 
-                    if (acHitElem->toucher.dmgFlags & DMG_SLASH) {
+                    if (acHitElem->atDmgInfo.dmgFlags & DMG_SLASH) {
                         this->cutType = sCutTypes[player->meleeWeaponAnimation];
                     } else {
                         this->cutType = CUT_POST;
diff --git a/src/overlays/actors/ovl_En_Karebaba/z_en_karebaba.c b/src/overlays/actors/ovl_En_Karebaba/z_en_karebaba.c
index 523b041522..53fb55984d 100644
--- a/src/overlays/actors/ovl_En_Karebaba/z_en_karebaba.c
+++ b/src/overlays/actors/ovl_En_Karebaba/z_en_karebaba.c
@@ -54,8 +54,8 @@ static ColliderCylinderInit sBodyColliderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 7, 25, 0, { 0, 0, 0 } },
@@ -74,8 +74,8 @@ static ColliderCylinderInit sHeadColliderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_HARD,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_HARD,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 4, 25, 0, { 0, 0, 0 } },
@@ -125,7 +125,7 @@ void EnKarebaba_ResetCollider(EnKarebaba* this) {
     this->bodyCollider.dim.height = 25;
     this->bodyCollider.base.colType = COLTYPE_HARD;
     this->bodyCollider.base.acFlags |= AC_HARD;
-    this->bodyCollider.elem.bumper.dmgFlags = DMG_DEFAULT;
+    this->bodyCollider.elem.acDmgInfo.dmgFlags = DMG_DEFAULT;
     this->headCollider.dim.height = 25;
 }
 
@@ -155,7 +155,7 @@ void EnKarebaba_SetupUpright(EnKarebaba* this) {
         Actor_SetScale(&this->actor, 0.01f);
         this->bodyCollider.base.colType = COLTYPE_HIT6;
         this->bodyCollider.base.acFlags &= ~AC_HARD;
-        this->bodyCollider.elem.bumper.dmgFlags =
+        this->bodyCollider.elem.acDmgInfo.dmgFlags =
             !LINK_IS_ADULT ? ((DMG_SWORD | DMG_BOOMERANG) & ~DMG_JUMP_MASTER) : (DMG_SWORD | DMG_BOOMERANG);
         this->bodyCollider.dim.radius = 15;
         this->bodyCollider.dim.height = 80;
diff --git a/src/overlays/actors/ovl_En_Ko/z_en_ko.c b/src/overlays/actors/ovl_En_Ko/z_en_ko.c
index 3fbf937024..72c74e0741 100644
--- a/src/overlays/actors/ovl_En_Ko/z_en_ko.c
+++ b/src/overlays/actors/ovl_En_Ko/z_en_ko.c
@@ -55,8 +55,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Kusa/z_en_kusa.c b/src/overlays/actors/ovl_En_Kusa/z_en_kusa.c
index 4dbfaeacaa..3e6bbb6c78 100644
--- a/src/overlays/actors/ovl_En_Kusa/z_en_kusa.c
+++ b/src/overlays/actors/ovl_En_Kusa/z_en_kusa.c
@@ -68,8 +68,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x4FC00758, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 12, 44, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Kz/z_en_kz.c b/src/overlays/actors/ovl_En_Kz/z_en_kz.c
index 837f86f87b..ce431636a1 100644
--- a/src/overlays/actors/ovl_En_Kz/z_en_kz.c
+++ b/src/overlays/actors/ovl_En_Kz/z_en_kz.c
@@ -47,8 +47,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 80, 120, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_M_Fire1/z_en_m_fire1.c b/src/overlays/actors/ovl_En_M_Fire1/z_en_m_fire1.c
index 038bb1bf11..5de6557784 100644
--- a/src/overlays/actors/ovl_En_M_Fire1/z_en_m_fire1.c
+++ b/src/overlays/actors/ovl_En_M_Fire1/z_en_m_fire1.c
@@ -37,8 +37,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK2,
         { 0x00000001, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { 200, 200, 0, { 0 } },
diff --git a/src/overlays/actors/ovl_En_M_Thunder/z_en_m_thunder.c b/src/overlays/actors/ovl_En_M_Thunder/z_en_m_thunder.c
index e1e6068017..2bc4831539 100644
--- a/src/overlays/actors/ovl_En_M_Thunder/z_en_m_thunder.c
+++ b/src/overlays/actors/ovl_En_M_Thunder/z_en_m_thunder.c
@@ -37,8 +37,8 @@ static ColliderCylinderInit D_80AA0420 = {
         ELEMTYPE_UNK2,
         { 0x00000001, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 200, 200, 0, { 0, 0, 0 } },
@@ -90,7 +90,7 @@ void EnMThunder_Init(Actor* thisx, PlayState* play2) {
 
         player->stateFlags2 &= ~PLAYER_STATE2_17;
         this->unk_1CA = 1;
-        this->collider.elem.toucher.dmgFlags = D_80AA044C[this->unk_1C7];
+        this->collider.elem.atDmgInfo.dmgFlags = D_80AA044C[this->unk_1C7];
         this->unk_1C6 = 1;
         this->unk_1C9 = ((this->unk_1C7 == 1) ? 2 : 4);
         func_80A9EFE0(this, func_80A9F9B4);
@@ -189,11 +189,11 @@ void func_80A9F408(EnMThunder* this, PlayState* play) {
                 gSaveContext.magicState = MAGIC_STATE_CONSUME_SETUP;
             }
             if (player->unk_858 < 0.85f) {
-                this->collider.elem.toucher.dmgFlags = D_80AA044C[this->unk_1C7];
+                this->collider.elem.atDmgInfo.dmgFlags = D_80AA044C[this->unk_1C7];
                 this->unk_1C6 = 1;
                 this->unk_1C9 = ((this->unk_1C7 == 1) ? 2 : 4);
             } else {
-                this->collider.elem.toucher.dmgFlags = D_80AA0458[this->unk_1C7];
+                this->collider.elem.atDmgInfo.dmgFlags = D_80AA0458[this->unk_1C7];
                 this->unk_1C6 = 0;
                 this->unk_1C9 = ((this->unk_1C7 == 1) ? 4 : 8);
             }
diff --git a/src/overlays/actors/ovl_En_Ma1/z_en_ma1.c b/src/overlays/actors/ovl_En_Ma1/z_en_ma1.c
index a0da7b0cd1..26795a516b 100644
--- a/src/overlays/actors/ovl_En_Ma1/z_en_ma1.c
+++ b/src/overlays/actors/ovl_En_Ma1/z_en_ma1.c
@@ -48,8 +48,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 18, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Ma2/z_en_ma2.c b/src/overlays/actors/ovl_En_Ma2/z_en_ma2.c
index 99622ab6b9..d840a4b538 100644
--- a/src/overlays/actors/ovl_En_Ma2/z_en_ma2.c
+++ b/src/overlays/actors/ovl_En_Ma2/z_en_ma2.c
@@ -42,8 +42,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 18, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Ma3/z_en_ma3.c b/src/overlays/actors/ovl_En_Ma3/z_en_ma3.c
index e769d93669..2bbc185636 100644
--- a/src/overlays/actors/ovl_En_Ma3/z_en_ma3.c
+++ b/src/overlays/actors/ovl_En_Ma3/z_en_ma3.c
@@ -45,8 +45,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 18, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Mb/z_en_mb.c b/src/overlays/actors/ovl_En_Mb/z_en_mb.c
index 621d2e4a95..92f3aac854 100644
--- a/src/overlays/actors/ovl_En_Mb/z_en_mb.c
+++ b/src/overlays/actors/ovl_En_Mb/z_en_mb.c
@@ -102,8 +102,8 @@ static ColliderCylinderInit sBodyColliderInit = {
         ELEMTYPE_UNK1,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 70, 0, { 0, 0, 0 } },
@@ -115,8 +115,8 @@ static ColliderTrisElementInit sFrontShieldingTrisInit[2] = {
             ELEMTYPE_UNK2,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE | BUMP_NO_AT_INFO,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE | ACELEM_NO_AT_INFO,
             OCELEM_NONE,
         },
         { { { -10.0f, 14.0f, 2.0f }, { -10.0f, -6.0f, 2.0f }, { 9.0f, 14.0f, 2.0f } } },
@@ -126,8 +126,8 @@ static ColliderTrisElementInit sFrontShieldingTrisInit[2] = {
             ELEMTYPE_UNK2,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE | BUMP_NO_AT_INFO,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE | ACELEM_NO_AT_INFO,
             OCELEM_NONE,
         },
         { { { -10.0f, -6.0f, 2.0f }, { 9.0f, -6.0f, 2.0f }, { 9.0f, 14.0f, 2.0f } } },
@@ -160,8 +160,8 @@ static ColliderQuadInit sAttackColliderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -296,7 +296,7 @@ void EnMb_Init(Actor* thisx, PlayState* play) {
             this->actor.uncullZoneScale = 800.0f;
             this->actor.uncullZoneDownward = 1800.0f;
             this->playerDetectionRange = 710.0f;
-            this->attackCollider.elem.toucher.dmgFlags = DMG_UNBLOCKABLE;
+            this->attackCollider.elem.atDmgInfo.dmgFlags = DMG_UNBLOCKABLE;
 
             relYawFromPlayer =
                 this->actor.world.rot.y - Math_Vec3f_Yaw(&this->actor.world.pos, &player->actor.world.pos);
diff --git a/src/overlays/actors/ovl_En_Md/z_en_md.c b/src/overlays/actors/ovl_En_Md/z_en_md.c
index 5b9a9c5cdf..879de69ecf 100644
--- a/src/overlays/actors/ovl_En_Md/z_en_md.c
+++ b/src/overlays/actors/ovl_En_Md/z_en_md.c
@@ -46,8 +46,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 36, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Mk/z_en_mk.c b/src/overlays/actors/ovl_En_Mk/z_en_mk.c
index 7660cf4bc1..d65a6f0375 100644
--- a/src/overlays/actors/ovl_En_Mk/z_en_mk.c
+++ b/src/overlays/actors/ovl_En_Mk/z_en_mk.c
@@ -41,8 +41,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Mm/z_en_mm.c b/src/overlays/actors/ovl_En_Mm/z_en_mm.c
index 28202269f9..2375b5e6ca 100644
--- a/src/overlays/actors/ovl_En_Mm/z_en_mm.c
+++ b/src/overlays/actors/ovl_En_Mm/z_en_mm.c
@@ -64,8 +64,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 18, 63, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Mm2/z_en_mm2.c b/src/overlays/actors/ovl_En_Mm2/z_en_mm2.c
index 8a683c4627..74636b9e24 100644
--- a/src/overlays/actors/ovl_En_Mm2/z_en_mm2.c
+++ b/src/overlays/actors/ovl_En_Mm2/z_en_mm2.c
@@ -60,8 +60,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000004, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 18, 63, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Mu/z_en_mu.c b/src/overlays/actors/ovl_En_Mu/z_en_mu.c
index 48df82e4ee..d6a8f2af01 100644
--- a/src/overlays/actors/ovl_En_Mu/z_en_mu.c
+++ b/src/overlays/actors/ovl_En_Mu/z_en_mu.c
@@ -30,8 +30,8 @@ static ColliderCylinderInit D_80AB0BD0 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 100, 70, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Nb/z_en_nb.c b/src/overlays/actors/ovl_En_Nb/z_en_nb.c
index 0d3c3b767d..5c0631fb69 100644
--- a/src/overlays/actors/ovl_En_Nb/z_en_nb.c
+++ b/src/overlays/actors/ovl_En_Nb/z_en_nb.c
@@ -70,8 +70,8 @@ static ColliderCylinderInitType1 sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 25, 80, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Niw/z_en_niw.c b/src/overlays/actors/ovl_En_Niw/z_en_niw.c
index 3e11d84b47..09963b6e82 100644
--- a/src/overlays/actors/ovl_En_Niw/z_en_niw.c
+++ b/src/overlays/actors/ovl_En_Niw/z_en_niw.c
@@ -86,8 +86,8 @@ static ColliderCylinderInit sCylinderInit1 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 15, 25, 4, { 0, 0, 0 } },
@@ -106,8 +106,8 @@ static ColliderCylinderInit sCylinderInit2 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 15, 25, 4, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Niw_Girl/z_en_niw_girl.c b/src/overlays/actors/ovl_En_Niw_Girl/z_en_niw_girl.c
index b1dadf4c16..33c98d4f8f 100644
--- a/src/overlays/actors/ovl_En_Niw_Girl/z_en_niw_girl.c
+++ b/src/overlays/actors/ovl_En_Niw_Girl/z_en_niw_girl.c
@@ -44,8 +44,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 10, 30, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Niw_Lady/z_en_niw_lady.c b/src/overlays/actors/ovl_En_Niw_Lady/z_en_niw_lady.c
index b48616a46d..9da760fb15 100644
--- a/src/overlays/actors/ovl_En_Niw_Lady/z_en_niw_lady.c
+++ b/src/overlays/actors/ovl_En_Niw_Lady/z_en_niw_lady.c
@@ -59,8 +59,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 10, 10, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Nutsball/z_en_nutsball.c b/src/overlays/actors/ovl_En_Nutsball/z_en_nutsball.c
index 1e927ba11a..1d05b78c35 100644
--- a/src/overlays/actors/ovl_En_Nutsball/z_en_nutsball.c
+++ b/src/overlays/actors/ovl_En_Nutsball/z_en_nutsball.c
@@ -47,8 +47,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_WOOD,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_WOOD,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 13, 13, 0, { 0 } },
@@ -120,7 +120,7 @@ void func_80ABBBA8(EnNutsball* this, PlayState* play) {
                 this->collider.base.atFlags &= ~AT_TYPE_ENEMY & ~AT_BOUNCED & ~AT_HIT;
                 this->collider.base.atFlags |= AT_TYPE_PLAYER;
 
-                this->collider.elem.toucher.dmgFlags = DMG_DEKU_STICK;
+                this->collider.elem.atDmgInfo.dmgFlags = DMG_DEKU_STICK;
                 Matrix_MtxFToYXZRotS(&player->shieldMf, &sp4C, 0);
                 this->actor.world.rot.y = sp4C.y + 0x8000;
                 this->timer = 30;
diff --git a/src/overlays/actors/ovl_En_Nwc/z_en_nwc.c b/src/overlays/actors/ovl_En_Nwc/z_en_nwc.c
index c9909e9779..a662e02403 100644
--- a/src/overlays/actors/ovl_En_Nwc/z_en_nwc.c
+++ b/src/overlays/actors/ovl_En_Nwc/z_en_nwc.c
@@ -47,8 +47,8 @@ static ColliderJntSphElementInit sJntSphElementInit = {
         ELEMTYPE_UNK1,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 0, { { 0, 0, 0 }, 10 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Ny/z_en_ny.c b/src/overlays/actors/ovl_En_Ny/z_en_ny.c
index 126a99728a..fd1332245e 100644
--- a/src/overlays/actors/ovl_En_Ny/z_en_ny.c
+++ b/src/overlays/actors/ovl_En_Ny/z_en_ny.c
@@ -41,8 +41,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x04, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 15 }, 100 },
@@ -305,9 +305,9 @@ s32 EnNy_CollisionCheck(EnNy* this, PlayState* play) {
     } else {
         if (this->collider.base.acFlags & AC_HIT) {
             this->collider.base.acFlags &= ~AC_HIT;
-            effectPos.x = this->collider.elements[0].base.bumper.hitPos.x;
-            effectPos.y = this->collider.elements[0].base.bumper.hitPos.y;
-            effectPos.z = this->collider.elements[0].base.bumper.hitPos.z;
+            effectPos.x = this->collider.elements[0].base.acDmgInfo.hitPos.x;
+            effectPos.y = this->collider.elements[0].base.acDmgInfo.hitPos.y;
+            effectPos.z = this->collider.elements[0].base.acDmgInfo.hitPos.z;
             if ((this->unk_1E0 == 0.25f) && (this->unk_1D4 == 0xFF)) {
                 switch (this->actor.colChkInfo.damageEffect) {
                     case 0xE:
diff --git a/src/overlays/actors/ovl_En_Okuta/z_en_okuta.c b/src/overlays/actors/ovl_En_Okuta/z_en_okuta.c
index d89c860924..3b4bbb26fc 100644
--- a/src/overlays/actors/ovl_En_Okuta/z_en_okuta.c
+++ b/src/overlays/actors/ovl_En_Okuta/z_en_okuta.c
@@ -44,8 +44,8 @@ static ColliderCylinderInit sProjectileColliderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_HARD,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_HARD,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 13, 20, 0, { 0, 0, 0 } },
@@ -64,8 +64,8 @@ static ColliderCylinderInit sOctorockColliderInit = {
         ELEMTYPE_UNK1,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 40, -30, { 0, 0, 0 } },
@@ -490,7 +490,7 @@ void EnOkuta_ProjectileFly(EnOkuta* this, PlayState* play) {
             this->collider.base.atFlags & AT_BOUNCED) {
             this->collider.base.atFlags &= ~(AT_HIT | AT_BOUNCED | AT_TYPE_ENEMY);
             this->collider.base.atFlags |= AT_TYPE_PLAYER;
-            this->collider.elem.toucher.dmgFlags = DMG_DEKU_STICK;
+            this->collider.elem.atDmgInfo.dmgFlags = DMG_DEKU_STICK;
             Matrix_MtxFToYXZRotS(&player->shieldMf, &shieldRot, 0);
             this->actor.world.rot.y = shieldRot.y + 0x8000;
             this->timer = 30;
diff --git a/src/overlays/actors/ovl_En_Ossan/z_en_ossan.c b/src/overlays/actors/ovl_En_Ossan/z_en_ossan.c
index 070944d501..784ac765cf 100644
--- a/src/overlays/actors/ovl_En_Ossan/z_en_ossan.c
+++ b/src/overlays/actors/ovl_En_Ossan/z_en_ossan.c
@@ -125,8 +125,8 @@ static ColliderCylinderInitType1 sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_NONE | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 30, 80, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Owl/z_en_owl.c b/src/overlays/actors/ovl_En_Owl/z_en_owl.c
index c2cbe4b9d4..b67d863e31 100644
--- a/src/overlays/actors/ovl_En_Owl/z_en_owl.c
+++ b/src/overlays/actors/ovl_En_Owl/z_en_owl.c
@@ -90,8 +90,8 @@ static ColliderCylinderInit sOwlCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Peehat/z_en_peehat.c b/src/overlays/actors/ovl_En_Peehat/z_en_peehat.c
index 5aa146fc51..8fa9e1a490 100644
--- a/src/overlays/actors/ovl_En_Peehat/z_en_peehat.c
+++ b/src/overlays/actors/ovl_En_Peehat/z_en_peehat.c
@@ -65,8 +65,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_NONE,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 50, 160, -70, { 0, 0, 0 } },
@@ -78,8 +78,8 @@ static ColliderJntSphElementInit sJntSphElemInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 20 }, 100 },
@@ -112,8 +112,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x10 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -231,7 +231,7 @@ void EnPeehat_Init(Actor* thisx, PlayState* play) {
             this->colCylinder.dim.radius = 25;
             this->colCylinder.dim.height = 15;
             this->colCylinder.dim.yShift = -5;
-            this->colCylinder.elem.bumper.dmgFlags = DMG_ARROW | DMG_SLINGSHOT;
+            this->colCylinder.elem.acDmgInfo.dmgFlags = DMG_ARROW | DMG_SLINGSHOT;
             this->colQuad.base.atFlags = AT_ON | AT_TYPE_ENEMY;
             this->colQuad.base.acFlags = AC_ON | AC_TYPE_PLAYER;
             this->actor.naviEnemyId = NAVI_ENEMY_PEAHAT_LARVA;
diff --git a/src/overlays/actors/ovl_En_Po_Desert/z_en_po_desert.c b/src/overlays/actors/ovl_En_Po_Desert/z_en_po_desert.c
index 2f6a161cec..3f814e796d 100644
--- a/src/overlays/actors/ovl_En_Po_Desert/z_en_po_desert.c
+++ b/src/overlays/actors/ovl_En_Po_Desert/z_en_po_desert.c
@@ -44,8 +44,8 @@ static ColliderCylinderInit sColliderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 25, 50, 20, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Po_Field/z_en_po_field.c b/src/overlays/actors/ovl_En_Po_Field/z_en_po_field.c
index ef39e231ea..f67ce8d4ef 100644
--- a/src/overlays/actors/ovl_En_Po_Field/z_en_po_field.c
+++ b/src/overlays/actors/ovl_En_Po_Field/z_en_po_field.c
@@ -58,8 +58,8 @@ static ColliderCylinderInit D_80AD7080 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 25, 50, 20, { 0, 0, 0 } },
@@ -78,8 +78,8 @@ static ColliderCylinderInit D_80AD70AC = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x01, 0x04 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { 10, 30, 0, { 0, 0, 0 } },
@@ -263,7 +263,7 @@ void EnPoField_SetupFlee(EnPoField* this) {
 
 void EnPoField_SetupDamage(EnPoField* this) {
     Animation_MorphToPlayOnce(&this->skelAnime, &gPoeFieldDamagedAnim, -6.0f);
-    if (this->collider.elem.acHitElem->toucher.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT)) {
+    if (this->collider.elem.acHitElem->atDmgInfo.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT)) {
         this->actor.world.rot.y = this->collider.base.ac->world.rot.y;
     } else {
         this->actor.world.rot.y = Actor_WorldYawTowardActor(&this->actor, this->collider.base.ac) + 0x8000;
diff --git a/src/overlays/actors/ovl_En_Po_Relay/z_en_po_relay.c b/src/overlays/actors/ovl_En_Po_Relay/z_en_po_relay.c
index bca1a872d5..4106c8f0cd 100644
--- a/src/overlays/actors/ovl_En_Po_Relay/z_en_po_relay.c
+++ b/src/overlays/actors/ovl_En_Po_Relay/z_en_po_relay.c
@@ -58,8 +58,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 30, 52, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Po_Sisters/z_en_po_sisters.c b/src/overlays/actors/ovl_En_Po_Sisters/z_en_po_sisters.c
index 27da379c4d..1315e00b98 100644
--- a/src/overlays/actors/ovl_En_Po_Sisters/z_en_po_sisters.c
+++ b/src/overlays/actors/ovl_En_Po_Sisters/z_en_po_sisters.c
@@ -86,8 +86,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0x4FC7FFEA, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 18, 60, 15, { 0, 0, 0 } },
@@ -210,7 +210,7 @@ void EnPoSisters_Init(Actor* thisx, PlayState* play) {
         } else {
             this->actor.flags &= ~(ACTOR_FLAG_9 | ACTOR_FLAG_14);
             this->collider.elem.elemType = ELEMTYPE_UNK4;
-            this->collider.elem.bumper.dmgFlags |= DMG_DEKU_NUT;
+            this->collider.elem.acDmgInfo.dmgFlags |= DMG_DEKU_NUT;
             this->collider.base.ocFlags1 = OC1_NONE;
             func_80AD9C24(this, NULL);
         }
@@ -301,7 +301,7 @@ void func_80AD9568(EnPoSisters* this) {
 void func_80AD95D8(EnPoSisters* this) {
     Animation_MorphToPlayOnce(&this->skelAnime, &gPoeSistersDamagedAnim, -3.0f);
     if (this->collider.base.ac != NULL) {
-        this->actor.world.rot.y = (this->collider.elem.acHitElem->toucher.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT))
+        this->actor.world.rot.y = (this->collider.elem.acHitElem->atDmgInfo.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT))
                                       ? this->collider.base.ac->world.rot.y
                                       : Actor_WorldYawTowardActor(&this->actor, this->collider.base.ac) + 0x8000;
     }
@@ -744,7 +744,7 @@ void func_80ADAD54(EnPoSisters* this, PlayState* play) {
 
     if (SkelAnime_Update(&this->skelAnime)) {
         this->unk_22E.a = 0;
-        this->collider.elem.bumper.dmgFlags = DMG_MAGIC_ICE | DMG_MAGIC_FIRE | DMG_DEKU_NUT;
+        this->collider.elem.acDmgInfo.dmgFlags = DMG_MAGIC_ICE | DMG_MAGIC_FIRE | DMG_DEKU_NUT;
         func_80AD93C4(this);
     } else {
         endFrame = this->skelAnime.endFrame;
@@ -757,8 +757,8 @@ void func_80ADAE6C(EnPoSisters* this, PlayState* play) {
         this->unk_22E.a = 255;
         if (this->unk_194 != 0) {
             this->unk_199 |= 1;
-            this->collider.elem.bumper.dmgFlags = (DMG_SWORD | DMG_ARROW | DMG_HAMMER | DMG_MAGIC_ICE | DMG_MAGIC_FIRE |
-                                                   DMG_HOOKSHOT | DMG_EXPLOSIVE | DMG_DEKU_STICK);
+            this->collider.elem.acDmgInfo.dmgFlags = (DMG_SWORD | DMG_ARROW | DMG_HAMMER | DMG_MAGIC_ICE |
+                                                      DMG_MAGIC_FIRE | DMG_HOOKSHOT | DMG_EXPLOSIVE | DMG_DEKU_STICK);
             if (this->unk_19A != 0) {
                 this->unk_19A--;
             }
diff --git a/src/overlays/actors/ovl_En_Poh/z_en_poh.c b/src/overlays/actors/ovl_En_Poh/z_en_poh.c
index ee737aaab7..10af760994 100644
--- a/src/overlays/actors/ovl_En_Poh/z_en_poh.c
+++ b/src/overlays/actors/ovl_En_Poh/z_en_poh.c
@@ -67,8 +67,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 40, 20, { 0, 0, 0 } },
@@ -80,8 +80,8 @@ static ColliderJntSphElementInit D_80AE1AA0[1] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 18, { { 0, 1400, 0 }, 10 }, 100 },
@@ -293,7 +293,7 @@ void func_80ADE28C(EnPoh* this) {
     } else {
         Animation_PlayOnce(&this->skelAnime, &gPoeComposerDamagedAnim);
     }
-    if (this->colliderCyl.elem.acHitElem->toucher.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT)) {
+    if (this->colliderCyl.elem.acHitElem->atDmgInfo.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT)) {
         this->actor.world.rot.y = this->colliderCyl.base.ac->world.rot.y;
     } else {
         this->actor.world.rot.y = Actor_WorldYawTowardActor(&this->actor, this->colliderCyl.base.ac) + 0x8000;
diff --git a/src/overlays/actors/ovl_En_Rd/z_en_rd.c b/src/overlays/actors/ovl_En_Rd/z_en_rd.c
index bb18687afd..cae3ead4ee 100644
--- a/src/overlays/actors/ovl_En_Rd/z_en_rd.c
+++ b/src/overlays/actors/ovl_En_Rd/z_en_rd.c
@@ -77,8 +77,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK1,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_NONE,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 20, 70, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Reeba/z_en_reeba.c b/src/overlays/actors/ovl_En_Reeba/z_en_reeba.c
index f91e619875..d2be030709 100644
--- a/src/overlays/actors/ovl_En_Reeba/z_en_reeba.c
+++ b/src/overlays/actors/ovl_En_Reeba/z_en_reeba.c
@@ -100,8 +100,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x08, 0x08 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 20, 40, 0, { 0, 0, 0 } },
@@ -132,8 +132,8 @@ void EnReeba_Init(Actor* thisx, PlayState* play) {
         // "Reeba Boss Appears %f"
         PRINTF(VT_FGCOL(YELLOW) "☆☆☆☆☆ リーバぼす登場 ☆☆☆☆☆ %f\n" VT_RST, this->scale);
         this->actor.colChkInfo.health = 20;
-        this->collider.elem.toucher.effect = 4;
-        this->collider.elem.toucher.damage = 16;
+        this->collider.elem.atDmgInfo.effect = 4;
+        this->collider.elem.atDmgInfo.damage = 16;
         Actor_ChangeCategory(play, &play->actorCtx, &this->actor, ACTORCAT_ENEMY);
     }
 
@@ -326,7 +326,7 @@ void EnReeba_MoveBig(EnReeba* this, PlayState* play) {
     }
 }
 
-void EnReeba_Bumped(EnReeba* this, PlayState* play) {
+void EnReeba_Recoiled(EnReeba* this, PlayState* play) {
     Math_ApproachZeroF(&this->actor.speed, 1.0f, 0.3f);
 
     if (this->moveTimer == 0) {
@@ -640,7 +640,7 @@ void EnReeba_Update(Actor* thisx, PlayState* play2) {
             this->actor.speed = 8.0f;
             this->actor.world.rot.y *= -1.0f;
             this->moveTimer = 14;
-            this->actionfunc = EnReeba_Bumped;
+            this->actionfunc = EnReeba_Recoiled;
             return;
         }
     }
diff --git a/src/overlays/actors/ovl_En_Rr/z_en_rr.c b/src/overlays/actors/ovl_En_Rr/z_en_rr.c
index 018420cef0..146f926a96 100644
--- a/src/overlays/actors/ovl_En_Rr/z_en_rr.c
+++ b/src/overlays/actors/ovl_En_Rr/z_en_rr.c
@@ -95,8 +95,8 @@ static ColliderCylinderInitType1 sCylinderInit1 = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 30, 55, 0, { 0, 0, 0 } },
@@ -114,8 +114,8 @@ static ColliderCylinderInitType1 sCylinderInit2 = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 20, -10, { 0, 0, 0 } },
@@ -419,9 +419,9 @@ void EnRr_CollisionCheck(EnRr* this, PlayState* play) {
         this->collider2.base.acFlags &= ~AC_HIT;
         // "Kakin" (not sure what this means)
         PRINTF(VT_FGCOL(GREEN) "カキン(%d)！！" VT_RST "\n", this->frameCount);
-        hitPos.x = this->collider2.elem.bumper.hitPos.x;
-        hitPos.y = this->collider2.elem.bumper.hitPos.y;
-        hitPos.z = this->collider2.elem.bumper.hitPos.z;
+        hitPos.x = this->collider2.elem.acDmgInfo.hitPos.x;
+        hitPos.y = this->collider2.elem.acDmgInfo.hitPos.y;
+        hitPos.z = this->collider2.elem.acDmgInfo.hitPos.z;
         CollisionCheck_SpawnShieldParticlesMetal2(play, &hitPos);
     } else {
         if (this->collider1.base.acFlags & AC_HIT) {
@@ -429,9 +429,9 @@ void EnRr_CollisionCheck(EnRr* this, PlayState* play) {
 
             this->collider1.base.acFlags &= ~AC_HIT;
             if (this->actor.colChkInfo.damageEffect != 0) {
-                hitPos.x = this->collider1.elem.bumper.hitPos.x;
-                hitPos.y = this->collider1.elem.bumper.hitPos.y;
-                hitPos.z = this->collider1.elem.bumper.hitPos.z;
+                hitPos.x = this->collider1.elem.acDmgInfo.hitPos.x;
+                hitPos.y = this->collider1.elem.acDmgInfo.hitPos.y;
+                hitPos.z = this->collider1.elem.acDmgInfo.hitPos.z;
                 CollisionCheck_BlueBlood(play, NULL, &hitPos);
             }
             switch (this->actor.colChkInfo.damageEffect) {
diff --git a/src/overlays/actors/ovl_En_Sa/z_en_sa.c b/src/overlays/actors/ovl_En_Sa/z_en_sa.c
index a055e7ea84..d60aa4e40c 100644
--- a/src/overlays/actors/ovl_En_Sa/z_en_sa.c
+++ b/src/overlays/actors/ovl_En_Sa/z_en_sa.c
@@ -58,8 +58,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Sb/z_en_sb.c b/src/overlays/actors/ovl_En_Sb/z_en_sb.c
index 07b4d9042e..5c3499be29 100644
--- a/src/overlays/actors/ovl_En_Sb/z_en_sb.c
+++ b/src/overlays/actors/ovl_En_Sb/z_en_sb.c
@@ -388,7 +388,7 @@ s32 EnSb_UpdateDamage(EnSb* this, PlayState* play) {
                 FALLTHROUGH;
             case 15: // explosions, arrow, hammer, ice arrow, light arrow, spirit arrow, shadow arrow
                 if (EnSb_IsVulnerable(this)) {
-                    hitY = this->collider.elem.bumper.hitPos.y - this->actor.world.pos.y;
+                    hitY = this->collider.elem.acDmgInfo.hitPos.y - this->actor.world.pos.y;
                     yawDiff = this->actor.yawTowardsPlayer - this->actor.shape.rot.y;
                     if ((hitY < 30.0f) && (hitY > 10.0f) && (yawDiff >= -0x1FFF) && (yawDiff < 0x2000)) {
                         Actor_ApplyDamage(&this->actor);
@@ -406,7 +406,7 @@ s32 EnSb_UpdateDamage(EnSb* this, PlayState* play) {
             case 1:  // hookshot/longshot
             case 13: // all sword damage
                 if (EnSb_IsVulnerable(this)) {
-                    hitY = this->collider.elem.bumper.hitPos.y - this->actor.world.pos.y;
+                    hitY = this->collider.elem.acDmgInfo.hitPos.y - this->actor.world.pos.y;
                     yawDiff = this->actor.yawTowardsPlayer - this->actor.shape.rot.y;
                     if ((hitY < 30.0f) && (hitY > 10.0f) && (yawDiff >= -0x1FFF) && (yawDiff < 0x2000)) {
                         Actor_ApplyDamage(&this->actor);
@@ -430,9 +430,9 @@ s32 EnSb_UpdateDamage(EnSb* this, PlayState* play) {
 
         // if player attack didn't do damage, play recoil sound effect and spawn sparks
         if (!tookDamage) {
-            hitPoint.x = this->collider.elem.bumper.hitPos.x;
-            hitPoint.y = this->collider.elem.bumper.hitPos.y;
-            hitPoint.z = this->collider.elem.bumper.hitPos.z;
+            hitPoint.x = this->collider.elem.acDmgInfo.hitPos.x;
+            hitPoint.y = this->collider.elem.acDmgInfo.hitPos.y;
+            hitPoint.z = this->collider.elem.acDmgInfo.hitPos.z;
             CollisionCheck_SpawnShieldParticlesMetal2(play, &hitPoint);
         }
     }
diff --git a/src/overlays/actors/ovl_En_Shopnuts/z_en_shopnuts.c b/src/overlays/actors/ovl_En_Shopnuts/z_en_shopnuts.c
index 406f96ce97..b351d6888d 100644
--- a/src/overlays/actors/ovl_En_Shopnuts/z_en_shopnuts.c
+++ b/src/overlays/actors/ovl_En_Shopnuts/z_en_shopnuts.c
@@ -46,8 +46,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Si/z_en_si.c b/src/overlays/actors/ovl_En_Si/z_en_si.c
index b121facd38..b6b3adf161 100644
--- a/src/overlays/actors/ovl_En_Si/z_en_si.c
+++ b/src/overlays/actors/ovl_En_Si/z_en_si.c
@@ -31,8 +31,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000090, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_NONE,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 20, 18, 2, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Skb/z_en_skb.c b/src/overlays/actors/ovl_En_Skb/z_en_skb.c
index b2e08703d9..d6cfb0bbc0 100644
--- a/src/overlays/actors/ovl_En_Skb/z_en_skb.c
+++ b/src/overlays/actors/ovl_En_Skb/z_en_skb.c
@@ -46,8 +46,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 15, { { 0, 0, 0 }, 10 }, 100 },
@@ -57,8 +57,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE,
             OCELEM_ON,
         },
         { 1, { { 0, 0, 0 }, 20 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Skj/z_en_skj.c b/src/overlays/actors/ovl_En_Skj/z_en_skj.c
index 758a2649a1..1fb08a6cdf 100644
--- a/src/overlays/actors/ovl_En_Skj/z_en_skj.c
+++ b/src/overlays/actors/ovl_En_Skj/z_en_skj.c
@@ -183,8 +183,8 @@ static ColliderCylinderInitType1 D_80B01678 = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x0, 0x08 },
         { 0xFFCFFFFF, 0x0, 0x0 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 8, 48, 0, { 0, 0, 0 } },
@@ -585,9 +585,9 @@ s32 EnSkj_CollisionCheck(EnSkj* this, PlayState* play) {
         this->collider.base.acFlags &= ~AC_HIT;
         switch (this->actor.colChkInfo.damageEffect) {
             case 0xF:
-                effectPos.x = this->collider.elem.bumper.hitPos.x;
-                effectPos.y = this->collider.elem.bumper.hitPos.y;
-                effectPos.z = this->collider.elem.bumper.hitPos.z;
+                effectPos.x = this->collider.elem.acDmgInfo.hitPos.x;
+                effectPos.y = this->collider.elem.acDmgInfo.hitPos.y;
+                effectPos.z = this->collider.elem.acDmgInfo.hitPos.z;
 
                 EnSkj_SpawnBlood(play, &effectPos);
                 EffectSsHitMark_SpawnFixedScale(play, 1, &effectPos);
diff --git a/src/overlays/actors/ovl_En_Skjneedle/z_en_skjneedle.c b/src/overlays/actors/ovl_En_Skjneedle/z_en_skjneedle.c
index 36521ba7e8..df3f584f91 100644
--- a/src/overlays/actors/ovl_En_Skjneedle/z_en_skjneedle.c
+++ b/src/overlays/actors/ovl_En_Skjneedle/z_en_skjneedle.c
@@ -40,8 +40,8 @@ static ColliderCylinderInitType1 sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 10, 4, -2, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Ssh/z_en_ssh.c b/src/overlays/actors/ovl_En_Ssh/z_en_ssh.c
index 61fbe3fe85..e7b9d3ee0f 100644
--- a/src/overlays/actors/ovl_En_Ssh/z_en_ssh.c
+++ b/src/overlays/actors/ovl_En_Ssh/z_en_ssh.c
@@ -55,8 +55,8 @@ static ColliderCylinderInit sCylinderInit1 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 32, 50, -24, { 0, 0, 0 } },
@@ -77,8 +77,8 @@ static ColliderCylinderInit sCylinderInit2 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 60, -30, { 0, 0, 0 } },
@@ -90,8 +90,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 1, { { 0, -240, 0 }, 28 }, 100 },
@@ -200,15 +200,15 @@ void EnSsh_InitColliders(EnSsh* this, PlayState* play) {
         Collider_SetCylinder(play, &this->colCylinder[i], &this->actor, cylinders[i]);
     }
 
-    this->colCylinder[0].elem.bumper.dmgFlags =
+    this->colCylinder[0].elem.acDmgInfo.dmgFlags =
         DMG_ARROW | DMG_MAGIC_FIRE | DMG_HOOKSHOT | DMG_HAMMER_SWING | DMG_EXPLOSIVE | DMG_DEKU_NUT;
-    this->colCylinder[1].elem.bumper.dmgFlags =
+    this->colCylinder[1].elem.acDmgInfo.dmgFlags =
         DMG_DEFAULT & ~(DMG_ARROW | DMG_MAGIC_FIRE | DMG_HOOKSHOT | DMG_HAMMER_SWING | DMG_EXPLOSIVE | DMG_DEKU_NUT) &
         ~(DMG_MAGIC_LIGHT | DMG_MAGIC_ICE);
     this->colCylinder[2].base.colType = COLTYPE_METAL;
-    this->colCylinder[2].elem.bumperFlags = BUMP_ON | BUMP_HOOKABLE | BUMP_NO_AT_INFO;
+    this->colCylinder[2].elem.acElemFlags = ACELEM_ON | ACELEM_HOOKABLE | ACELEM_NO_AT_INFO;
     this->colCylinder[2].elem.elemType = ELEMTYPE_UNK2;
-    this->colCylinder[2].elem.bumper.dmgFlags =
+    this->colCylinder[2].elem.acDmgInfo.dmgFlags =
         DMG_DEFAULT & ~(DMG_ARROW | DMG_MAGIC_FIRE | DMG_HOOKSHOT | DMG_HAMMER_SWING | DMG_EXPLOSIVE | DMG_DEKU_NUT);
 
     CollisionCheck_SetInfo2(&this->actor.colChkInfo, DamageTable_Get(2), &sColChkInfoInit);
@@ -438,13 +438,13 @@ void EnSsh_CheckBodyStickHit(EnSsh* this, PlayState* play) {
     Player* player = GET_PLAYER(play);
 
     if (player->unk_860 != 0) {
-        elem->bumper.dmgFlags |= DMG_DEKU_STICK;
-        this->colCylinder[1].elem.bumper.dmgFlags &= ~DMG_DEKU_STICK;
-        this->colCylinder[2].elem.bumper.dmgFlags &= ~DMG_DEKU_STICK;
+        elem->acDmgInfo.dmgFlags |= DMG_DEKU_STICK;
+        this->colCylinder[1].elem.acDmgInfo.dmgFlags &= ~DMG_DEKU_STICK;
+        this->colCylinder[2].elem.acDmgInfo.dmgFlags &= ~DMG_DEKU_STICK;
     } else {
-        elem->bumper.dmgFlags &= ~DMG_DEKU_STICK;
-        this->colCylinder[1].elem.bumper.dmgFlags |= DMG_DEKU_STICK;
-        this->colCylinder[2].elem.bumper.dmgFlags |= DMG_DEKU_STICK;
+        elem->acDmgInfo.dmgFlags &= ~DMG_DEKU_STICK;
+        this->colCylinder[1].elem.acDmgInfo.dmgFlags |= DMG_DEKU_STICK;
+        this->colCylinder[2].elem.acDmgInfo.dmgFlags |= DMG_DEKU_STICK;
     }
 }
 
diff --git a/src/overlays/actors/ovl_En_St/z_en_st.c b/src/overlays/actors/ovl_En_St/z_en_st.c
index 55aa065dd4..b7983ad59b 100644
--- a/src/overlays/actors/ovl_En_St/z_en_st.c
+++ b/src/overlays/actors/ovl_En_St/z_en_st.c
@@ -48,8 +48,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 32, 50, -24, { 0, 0, 0 } },
@@ -70,8 +70,8 @@ static ColliderCylinderInit sCylinderInit2 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 60, -30, { 0, 0, 0 } },
@@ -83,8 +83,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 1, { { 0, -240, 0 }, 28 }, 100 },
@@ -285,16 +285,16 @@ void EnSt_InitColliders(EnSt* this, PlayState* play) {
         Collider_SetCylinder(play, &this->colCylinder[i], &this->actor, cylinders[i]);
     }
 
-    this->colCylinder[0].elem.bumper.dmgFlags =
+    this->colCylinder[0].elem.acDmgInfo.dmgFlags =
         DMG_MAGIC_FIRE | DMG_ARROW | DMG_HOOKSHOT | DMG_HAMMER_SWING | DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT;
-    this->colCylinder[1].elem.bumper.dmgFlags =
+    this->colCylinder[1].elem.acDmgInfo.dmgFlags =
         DMG_DEFAULT &
         ~(DMG_MAGIC_FIRE | DMG_ARROW | DMG_HOOKSHOT | DMG_HAMMER_SWING | DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT) &
         ~(DMG_MAGIC_LIGHT | DMG_MAGIC_ICE);
     this->colCylinder[2].base.colType = COLTYPE_METAL;
-    this->colCylinder[2].elem.bumperFlags = BUMP_ON | BUMP_HOOKABLE | BUMP_NO_AT_INFO;
+    this->colCylinder[2].elem.acElemFlags = ACELEM_ON | ACELEM_HOOKABLE | ACELEM_NO_AT_INFO;
     this->colCylinder[2].elem.elemType = ELEMTYPE_UNK2;
-    this->colCylinder[2].elem.bumper.dmgFlags =
+    this->colCylinder[2].elem.acDmgInfo.dmgFlags =
         DMG_DEFAULT &
         ~(DMG_MAGIC_FIRE | DMG_ARROW | DMG_HOOKSHOT | DMG_HAMMER_SWING | DMG_BOOMERANG | DMG_EXPLOSIVE | DMG_DEKU_NUT);
 
@@ -309,13 +309,13 @@ void EnSt_CheckBodyStickHit(EnSt* this, PlayState* play) {
     Player* player = GET_PLAYER(play);
 
     if (player->unk_860 != 0) {
-        bodyElem->bumper.dmgFlags |= DMG_DEKU_STICK;
-        this->colCylinder[1].elem.bumper.dmgFlags &= ~DMG_DEKU_STICK;
-        this->colCylinder[2].elem.bumper.dmgFlags &= ~DMG_DEKU_STICK;
+        bodyElem->acDmgInfo.dmgFlags |= DMG_DEKU_STICK;
+        this->colCylinder[1].elem.acDmgInfo.dmgFlags &= ~DMG_DEKU_STICK;
+        this->colCylinder[2].elem.acDmgInfo.dmgFlags &= ~DMG_DEKU_STICK;
     } else {
-        bodyElem->bumper.dmgFlags &= ~DMG_DEKU_STICK;
-        this->colCylinder[1].elem.bumper.dmgFlags |= DMG_DEKU_STICK;
-        this->colCylinder[2].elem.bumper.dmgFlags |= DMG_DEKU_STICK;
+        bodyElem->acDmgInfo.dmgFlags &= ~DMG_DEKU_STICK;
+        this->colCylinder[1].elem.acDmgInfo.dmgFlags |= DMG_DEKU_STICK;
+        this->colCylinder[2].elem.acDmgInfo.dmgFlags |= DMG_DEKU_STICK;
     }
 }
 
@@ -431,14 +431,14 @@ s32 EnSt_CheckHitBackside(EnSt* this, PlayState* play) {
     if (cyl->base.acFlags & AC_HIT) {
         cyl->base.acFlags &= ~AC_HIT;
         hit = true;
-        flags |= cyl->elem.acHitElem->toucher.dmgFlags;
+        flags |= cyl->elem.acHitElem->atDmgInfo.dmgFlags;
     }
 
     cyl = &this->colCylinder[1];
     if (cyl->base.acFlags & AC_HIT) {
         cyl->base.acFlags &= ~AC_HIT;
         hit = true;
-        flags |= cyl->elem.acHitElem->toucher.dmgFlags;
+        flags |= cyl->elem.acHitElem->atDmgInfo.dmgFlags;
     }
 
     if (!hit) {
diff --git a/src/overlays/actors/ovl_En_Sth/z_en_sth.c b/src/overlays/actors/ovl_En_Sth/z_en_sth.c
index 2918e8adea..66416baba9 100644
--- a/src/overlays/actors/ovl_En_Sth/z_en_sth.c
+++ b/src/overlays/actors/ovl_En_Sth/z_en_sth.c
@@ -49,8 +49,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Sw/z_en_sw.c b/src/overlays/actors/ovl_En_Sw/z_en_sw.c
index 240beec6c4..6ffffd208c 100644
--- a/src/overlays/actors/ovl_En_Sw/z_en_sw.c
+++ b/src/overlays/actors/ovl_En_Sw/z_en_sw.c
@@ -283,7 +283,7 @@ void EnSw_Init(Actor* thisx, PlayState* play) {
             this->actor.scale.x = 0.0f;
             FALLTHROUGH;
         case 1:
-            this->collider.elements[0].base.toucher.damage *= 2;
+            this->collider.elements[0].base.atDmgInfo.damage *= 2;
             this->actor.naviEnemyId = NAVI_ENEMY_GOLD_SKULLTULA;
             this->actor.colChkInfo.health *= 2;
             this->actor.flags &= ~ACTOR_FLAG_0;
@@ -538,14 +538,14 @@ void func_80B0D590(EnSw* this, PlayState* play) {
 
     if (((this->actor.params & 0xE000) >> 0xD) == 2) {
         if (this->actor.scale.x < 0.0139999995f) {
-            this->collider.elements[0].base.toucherFlags = TOUCH_NONE;
-            this->collider.elements[0].base.bumperFlags = BUMP_NONE;
+            this->collider.elements[0].base.atElemFlags = ATELEM_NONE;
+            this->collider.elements[0].base.acElemFlags = ACELEM_NONE;
             this->collider.elements[0].base.ocElemFlags = OCELEM_NONE;
         }
 
         if (this->actor.scale.x >= 0.0139999995f) {
-            this->collider.elements[0].base.toucherFlags = TOUCH_ON;
-            this->collider.elements[0].base.bumperFlags = BUMP_ON;
+            this->collider.elements[0].base.atElemFlags = ATELEM_ON;
+            this->collider.elements[0].base.acElemFlags = ACELEM_ON;
             this->collider.elements[0].base.ocElemFlags = OCELEM_ON;
         }
 
diff --git a/src/overlays/actors/ovl_En_Syateki_Niw/z_en_syateki_niw.c b/src/overlays/actors/ovl_En_Syateki_Niw/z_en_syateki_niw.c
index d5918f9363..9da826cd60 100644
--- a/src/overlays/actors/ovl_En_Syateki_Niw/z_en_syateki_niw.c
+++ b/src/overlays/actors/ovl_En_Syateki_Niw/z_en_syateki_niw.c
@@ -51,8 +51,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 10, 20, 4, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Ta/z_en_ta.c b/src/overlays/actors/ovl_En_Ta/z_en_ta.c
index 0cd64c8cdf..b9575cf6eb 100644
--- a/src/overlays/actors/ovl_En_Ta/z_en_ta.c
+++ b/src/overlays/actors/ovl_En_Ta/z_en_ta.c
@@ -82,8 +82,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000004, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 40, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Test/z_en_test.c b/src/overlays/actors/ovl_En_Test/z_en_test.c
index af9653e9d6..1371a2adba 100644
--- a/src/overlays/actors/ovl_En_Test/z_en_test.c
+++ b/src/overlays/actors/ovl_En_Test/z_en_test.c
@@ -150,8 +150,8 @@ static ColliderCylinderInit sBodyColliderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 25, 65, 0, { 0, 0, 0 } },
@@ -170,8 +170,8 @@ static ColliderCylinderInit sShieldColliderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFC1FFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 20, 70, -50, { 0, 0, 0 } },
@@ -190,8 +190,8 @@ static ColliderQuadInit sSwordColliderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x10 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL | TOUCH_UNK7,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL | ATELEM_UNK7,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -899,7 +899,7 @@ void EnTest_SetupSlashDown(EnTest* this) {
     this->unk_7C8 = 0x10;
     this->actor.speed = 0.0f;
     EnTest_SetupAction(this, EnTest_SlashDown);
-    this->swordCollider.elem.toucher.damage = 16;
+    this->swordCollider.elem.atDmgInfo.damage = 16;
 
     if (this->unk_7DE != 0) {
         this->unk_7DE = 3;
@@ -996,7 +996,7 @@ void EnTest_SetupSlashUp(EnTest* this) {
     Animation_PlayOnce(&this->skelAnime, &gStalfosUpSlashAnim);
     this->swordCollider.base.atFlags &= ~AT_BOUNCED;
     this->unk_7C8 = 0x11;
-    this->swordCollider.elem.toucher.damage = 16;
+    this->swordCollider.elem.atDmgInfo.damage = 16;
     this->actor.speed = 0.0f;
     EnTest_SetupAction(this, EnTest_SlashUp);
 
@@ -1085,7 +1085,7 @@ void EnTest_SetupJumpslash(EnTest* this) {
     this->actor.world.rot.y = this->actor.shape.rot.y;
     this->swordCollider.base.atFlags &= ~AT_BOUNCED;
     EnTest_SetupAction(this, EnTest_Jumpslash);
-    this->swordCollider.elem.toucher.damage = 32;
+    this->swordCollider.elem.atDmgInfo.damage = 32;
 
     if (this->unk_7DE != 0) {
         this->unk_7DE = 3;
diff --git a/src/overlays/actors/ovl_En_Tg/z_en_tg.c b/src/overlays/actors/ovl_En_Tg/z_en_tg.c
index 4e00d3bc33..403ea500f9 100644
--- a/src/overlays/actors/ovl_En_Tg/z_en_tg.c
+++ b/src/overlays/actors/ovl_En_Tg/z_en_tg.c
@@ -29,8 +29,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 64, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Tite/z_en_tite.c b/src/overlays/actors/ovl_En_Tite/z_en_tite.c
index e543158d06..adf19950a7 100644
--- a/src/overlays/actors/ovl_En_Tite/z_en_tite.c
+++ b/src/overlays/actors/ovl_En_Tite/z_en_tite.c
@@ -92,8 +92,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x08 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON | BUMP_HOOKABLE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON | ACELEM_HOOKABLE,
             OCELEM_ON,
         },
         { 0, { { 0, 1500, 0 }, 20 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Tk/z_en_tk.c b/src/overlays/actors/ovl_En_Tk/z_en_tk.c
index d0e331f7c0..b48964c8fb 100644
--- a/src/overlays/actors/ovl_En_Tk/z_en_tk.c
+++ b/src/overlays/actors/ovl_En_Tk/z_en_tk.c
@@ -150,8 +150,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 30, 52, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Torch2/z_en_torch2.c b/src/overlays/actors/ovl_En_Torch2/z_en_torch2.c
index 32df4ef157..8c3c1c90a8 100644
--- a/src/overlays/actors/ovl_En_Torch2/z_en_torch2.c
+++ b/src/overlays/actors/ovl_En_Torch2/z_en_torch2.c
@@ -104,8 +104,8 @@ void EnTorch2_Init(Actor* thisx, PlayState* play2) {
     this->meleeWeaponQuads[0].base.atFlags = this->meleeWeaponQuads[1].base.atFlags = AT_ON | AT_TYPE_ENEMY;
     this->meleeWeaponQuads[0].base.acFlags = this->meleeWeaponQuads[1].base.acFlags = AC_ON | AC_HARD | AC_TYPE_PLAYER;
     this->meleeWeaponQuads[0].base.colType = this->meleeWeaponQuads[1].base.colType = COLTYPE_METAL;
-    this->meleeWeaponQuads[0].elem.toucher.damage = this->meleeWeaponQuads[1].elem.toucher.damage = 8;
-    this->meleeWeaponQuads[0].elem.bumperFlags = this->meleeWeaponQuads[1].elem.bumperFlags = BUMP_ON;
+    this->meleeWeaponQuads[0].elem.atDmgInfo.damage = this->meleeWeaponQuads[1].elem.atDmgInfo.damage = 8;
+    this->meleeWeaponQuads[0].elem.acElemFlags = this->meleeWeaponQuads[1].elem.acElemFlags = ACELEM_ON;
     this->shieldQuad.base.atFlags = AT_ON | AT_TYPE_ENEMY;
     this->shieldQuad.base.acFlags = AC_ON | AC_HARD | AC_TYPE_PLAYER;
     this->actor.colChkInfo.damageTable = &sDamageTable;
diff --git a/src/overlays/actors/ovl_En_Toryo/z_en_toryo.c b/src/overlays/actors/ovl_En_Toryo/z_en_toryo.c
index 4d57b44c5d..38e5f46d53 100644
--- a/src/overlays/actors/ovl_En_Toryo/z_en_toryo.c
+++ b/src/overlays/actors/ovl_En_Toryo/z_en_toryo.c
@@ -43,8 +43,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 18, 63, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Tp/z_en_tp.c b/src/overlays/actors/ovl_En_Tp/z_en_tp.c
index 218f5615f7..73282570e3 100644
--- a/src/overlays/actors/ovl_En_Tp/z_en_tp.c
+++ b/src/overlays/actors/ovl_En_Tp/z_en_tp.c
@@ -57,8 +57,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x03, 0x08 },
             { 0xFFCFFFFF, 0x01, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_ON,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 4 }, 100 },
diff --git a/src/overlays/actors/ovl_En_Trap/z_en_trap.c b/src/overlays/actors/ovl_En_Trap/z_en_trap.c
index c675e84d33..6c21a07c25 100644
--- a/src/overlays/actors/ovl_En_Trap/z_en_trap.c
+++ b/src/overlays/actors/ovl_En_Trap/z_en_trap.c
@@ -55,7 +55,7 @@ static ColliderCylinderInit sCylinderInit = {
         OC2_TYPE_1,
         COLSHAPE_CYLINDER,
     },
-    { ELEMTYPE_UNK0, { 0x00000000, 0x00, 0x00 }, { 0x00001000, 0x00, 0x00 }, TOUCH_NONE, BUMP_ON, OCELEM_ON },
+    { ELEMTYPE_UNK0, { 0x00000000, 0x00, 0x00 }, { 0x00001000, 0x00, 0x00 }, ATELEM_NONE, ACELEM_ON, OCELEM_ON },
     { 30, 20, 0, { 0, 0, 0 } },
 };
 
diff --git a/src/overlays/actors/ovl_En_Tubo_Trap/z_en_tubo_trap.c b/src/overlays/actors/ovl_En_Tubo_Trap/z_en_tubo_trap.c
index 28bf2a3a2d..45d19e4f2e 100644
--- a/src/overlays/actors/ovl_En_Tubo_Trap/z_en_tubo_trap.c
+++ b/src/overlays/actors/ovl_En_Tubo_Trap/z_en_tubo_trap.c
@@ -33,8 +33,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x04 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 9, 23, 0, { 0 } },
diff --git a/src/overlays/actors/ovl_En_Vali/z_en_vali.c b/src/overlays/actors/ovl_En_Vali/z_en_vali.c
index 30ab7d6afb..b48c0e3e20 100644
--- a/src/overlays/actors/ovl_En_Vali/z_en_vali.c
+++ b/src/overlays/actors/ovl_En_Vali/z_en_vali.c
@@ -54,8 +54,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x07, 0x08 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -74,8 +74,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x07, 0x08 },
         { 0xFFCFFFFF, 0x01, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 17, 35, -15, { 0, 0, 0 } },
@@ -258,7 +258,7 @@ void EnVali_SetupStunned(EnVali* this) {
     this->timer = 80;
     this->actor.velocity.y = 0.0f;
     Actor_SetColorFilter(&this->actor, COLORFILTER_COLORFLAG_BLUE, 255, COLORFILTER_BUFFLAG_XLU, 80);
-    this->bodyCollider.elem.bumper.effect = 0;
+    this->bodyCollider.elem.acDmgInfo.effect = 0;
     Actor_PlaySfx(&this->actor, NA_SE_EN_GOMA_JR_FREEZE);
     this->actor.velocity.y = 1.0f;
     this->actionFunc = EnVali_Stunned;
@@ -448,7 +448,7 @@ void EnVali_Stunned(EnVali* this, PlayState* play) {
     }
 
     if (this->timer == 0) {
-        this->bodyCollider.elem.bumper.effect = 1; // Shock?
+        this->bodyCollider.elem.acDmgInfo.effect = 1; // Shock?
         EnVali_SetupFloatIdle(this);
     }
 }
diff --git a/src/overlays/actors/ovl_En_Vb_Ball/z_en_vb_ball.c b/src/overlays/actors/ovl_En_Vb_Ball/z_en_vb_ball.c
index ce7803bc4f..695b88014b 100644
--- a/src/overlays/actors/ovl_En_Vb_Ball/z_en_vb_ball.c
+++ b/src/overlays/actors/ovl_En_Vb_Ball/z_en_vb_ball.c
@@ -41,8 +41,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK6,
         { 0x00100700, 0x00, 0x20 },
         { 0x00100700, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 30, 10, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Vm/z_en_vm.c b/src/overlays/actors/ovl_En_Vm/z_en_vm.c
index e9cdcddabf..25f13383ca 100644
--- a/src/overlays/actors/ovl_En_Vm/z_en_vm.c
+++ b/src/overlays/actors/ovl_En_Vm/z_en_vm.c
@@ -48,8 +48,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 25, 70, 0, { 0, 0, 0 } },
@@ -68,8 +68,8 @@ static ColliderQuadInit sQuadInit1 = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x10 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL | TOUCH_UNK7,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL | ATELEM_UNK7,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -88,8 +88,8 @@ static ColliderQuadInit sQuadInit2 = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_En_Wallmas/z_en_wallmas.c b/src/overlays/actors/ovl_En_Wallmas/z_en_wallmas.c
index 6793ae1cef..645b077de7 100644
--- a/src/overlays/actors/ovl_En_Wallmas/z_en_wallmas.c
+++ b/src/overlays/actors/ovl_En_Wallmas/z_en_wallmas.c
@@ -63,8 +63,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 40, 0, { 0 } },
@@ -219,7 +219,7 @@ void EnWallmas_SetupReturnToCeiling(EnWallmas* this) {
 
 void EnWallmas_SetupTakeDamage(EnWallmas* this) {
     Animation_MorphToPlayOnce(&this->skelAnime, &gWallmasterDamageAnim, -3.0f);
-    if (this->collider.elem.acHitElem->toucher.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT)) {
+    if (this->collider.elem.acHitElem->atDmgInfo.dmgFlags & (DMG_ARROW | DMG_SLINGSHOT)) {
         this->actor.world.rot.y = this->collider.base.ac->world.rot.y;
     } else {
         this->actor.world.rot.y = Actor_WorldYawTowardActor(&this->actor, this->collider.base.ac) + 0x8000;
diff --git a/src/overlays/actors/ovl_En_Weiyer/z_en_weiyer.c b/src/overlays/actors/ovl_En_Weiyer/z_en_weiyer.c
index 9ff20a2e51..693e2796cc 100644
--- a/src/overlays/actors/ovl_En_Weiyer/z_en_weiyer.c
+++ b/src/overlays/actors/ovl_En_Weiyer/z_en_weiyer.c
@@ -51,8 +51,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_HARD,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_HARD,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 16, 10, -6, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Wf/z_en_wf.c b/src/overlays/actors/ovl_En_Wf/z_en_wf.c
index 9863713a19..a0088fc699 100644
--- a/src/overlays/actors/ovl_En_Wf/z_en_wf.c
+++ b/src/overlays/actors/ovl_En_Wf/z_en_wf.c
@@ -49,8 +49,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[4] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { WOLFOS_LIMB_FRONT_RIGHT_CLAW, { { 0, 0, 0 }, 15 }, 100 },
@@ -60,8 +60,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[4] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x04 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { WOLFOS_LIMB_FRONT_LEFT_CLAW, { { 0, 0, 0 }, 15 }, 100 },
@@ -71,8 +71,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[4] = {
             ELEMTYPE_UNK1,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFC1FFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE,
             OCELEM_ON,
         },
         { WOLFOS_LIMB_HEAD, { { 800, 0, 0 }, 25 }, 100 },
@@ -82,8 +82,8 @@ static ColliderJntSphElementInit sJntSphItemsInit[4] = {
             ELEMTYPE_UNK1,
             { 0x00000000, 0x00, 0x00 },
             { 0xFFC1FFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON | BUMP_HOOKABLE,
+            ATELEM_NONE,
+            ACELEM_ON | ACELEM_HOOKABLE,
             OCELEM_ON,
         },
         { WOLFOS_LIMB_THORAX, { { 0, 0, 0 }, 30 }, 100 },
@@ -116,8 +116,8 @@ static ColliderCylinderInit sBodyCylinderInit = {
         ELEMTYPE_UNK1,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 20, 50, 0, { 0, 0, 0 } },
@@ -136,8 +136,8 @@ static ColliderCylinderInit sTailCylinderInit = {
         ELEMTYPE_UNK1,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 15, 20, -15, { 0, 0, 0 } },
@@ -241,8 +241,8 @@ void EnWf_Init(Actor* thisx, PlayState* play) {
         SkelAnime_InitFlex(play, &this->skelAnime, &gWolfosWhiteSkel, &gWolfosWaitingAnim, this->jointTable,
                            this->morphTable, WOLFOS_LIMB_MAX);
         Actor_SetScale(thisx, 0.01f);
-        this->colliderSpheres.elements[0].base.toucher.damage = this->colliderSpheres.elements[1].base.toucher.damage =
-            8;
+        this->colliderSpheres.elements[0].base.atDmgInfo.damage =
+            this->colliderSpheres.elements[1].base.atDmgInfo.damage = 8;
         thisx->naviEnemyId = NAVI_ENEMY_WHITE_WOLFOS;
     }
 
diff --git a/src/overlays/actors/ovl_En_Wonder_Item/z_en_wonder_item.c b/src/overlays/actors/ovl_En_Wonder_Item/z_en_wonder_item.c
index 28d894bed0..2ead519335 100644
--- a/src/overlays/actors/ovl_En_Wonder_Item/z_en_wonder_item.c
+++ b/src/overlays/actors/ovl_En_Wonder_Item/z_en_wonder_item.c
@@ -34,8 +34,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 20, 30, 0, { 0, 0, 0 } },
@@ -159,7 +159,7 @@ void EnWonderItem_Init(Actor* thisx, PlayState* play) {
             colTypeIndex = this->actor.world.rot.z & 0xFF;
             Collider_InitCylinder(play, &this->collider);
             Collider_SetCylinder(play, &this->collider, &this->actor, &sCylinderInit);
-            this->collider.elem.bumper.dmgFlags = damageFlags[colTypeIndex];
+            this->collider.elem.acDmgInfo.dmgFlags = damageFlags[colTypeIndex];
             this->collider.dim.radius = 20;
             this->collider.dim.height = 30;
             this->updateFunc = EnWonderItem_InteractSwitch;
@@ -188,7 +188,7 @@ void EnWonderItem_Init(Actor* thisx, PlayState* play) {
         case WONDERITEM_BOMB_SOLDIER:
             Collider_InitCylinder(play, &this->collider);
             Collider_SetCylinder(play, &this->collider, &this->actor, &sCylinderInit);
-            this->collider.elem.bumper.dmgFlags = DMG_SLINGSHOT;
+            this->collider.elem.acDmgInfo.dmgFlags = DMG_SLINGSHOT;
             this->unkPos = this->actor.world.pos;
             this->collider.dim.radius = 35;
             this->collider.dim.height = 75;
diff --git a/src/overlays/actors/ovl_En_Wood02/z_en_wood02.c b/src/overlays/actors/ovl_En_Wood02/z_en_wood02.c
index 9d2decda7c..6845d39837 100644
--- a/src/overlays/actors/ovl_En_Wood02/z_en_wood02.c
+++ b/src/overlays/actors/ovl_En_Wood02/z_en_wood02.c
@@ -58,8 +58,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK5,
         { 0x00000000, 0x00, 0x00 },
         { 0x0FC0074A, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 18, 60, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Xc/z_en_xc.c b/src/overlays/actors/ovl_En_Xc/z_en_xc.c
index 3df3e36bfb..b2b8dda8c1 100644
--- a/src/overlays/actors/ovl_En_Xc/z_en_xc.c
+++ b/src/overlays/actors/ovl_En_Xc/z_en_xc.c
@@ -40,8 +40,8 @@ static ColliderCylinderInitType1 sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 25, 80, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Yabusame_Mark/z_en_yabusame_mark.c b/src/overlays/actors/ovl_En_Yabusame_Mark/z_en_yabusame_mark.c
index 6cf0b7a5e5..8d7cf097de 100644
--- a/src/overlays/actors/ovl_En_Yabusame_Mark/z_en_yabusame_mark.c
+++ b/src/overlays/actors/ovl_En_Yabusame_Mark/z_en_yabusame_mark.c
@@ -27,8 +27,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x0001F824, 0x00, 0x00 },
-        TOUCH_NONE | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_NONE | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -128,9 +128,9 @@ void func_80B42F74(EnYabusameMark* this, PlayState* play) {
     if (this->collider.base.acFlags & AC_HIT) {
         this->collider.base.acFlags &= ~AC_HIT;
 
-        arrowHitPos.x = this->collider.elem.bumper.hitPos.x;
-        arrowHitPos.y = this->collider.elem.bumper.hitPos.y;
-        arrowHitPos.z = this->collider.elem.bumper.hitPos.z;
+        arrowHitPos.x = this->collider.elem.acDmgInfo.hitPos.x;
+        arrowHitPos.y = this->collider.elem.acDmgInfo.hitPos.y;
+        arrowHitPos.z = this->collider.elem.acDmgInfo.hitPos.z;
 
         effectVelocity.y = 15.0f;
 
diff --git a/src/overlays/actors/ovl_En_Yukabyun/z_en_yukabyun.c b/src/overlays/actors/ovl_En_Yukabyun/z_en_yukabyun.c
index e6d39e6a57..c133bde62b 100644
--- a/src/overlays/actors/ovl_En_Yukabyun/z_en_yukabyun.c
+++ b/src/overlays/actors/ovl_En_Yukabyun/z_en_yukabyun.c
@@ -43,8 +43,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x04 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_HARD,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_HARD,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 28, 8, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Zf/z_en_zf.c b/src/overlays/actors/ovl_En_Zf/z_en_zf.c
index ddf9af8e79..05ef602b33 100644
--- a/src/overlays/actors/ovl_En_Zf/z_en_zf.c
+++ b/src/overlays/actors/ovl_En_Zf/z_en_zf.c
@@ -124,8 +124,8 @@ static ColliderCylinderInit sBodyCylinderInit = {
         ELEMTYPE_UNK1,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 20, 70, 0, { 0, 0, 0 } },
@@ -144,8 +144,8 @@ static ColliderQuadInit sSwordQuadInit = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x00, 0x08 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL | TOUCH_UNK7,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL | ATELEM_UNK7,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
diff --git a/src/overlays/actors/ovl_En_Zl1/z_en_zl1.c b/src/overlays/actors/ovl_En_Zl1/z_en_zl1.c
index 8815b37ba3..aed5c9b0fb 100644
--- a/src/overlays/actors/ovl_En_Zl1/z_en_zl1.c
+++ b/src/overlays/actors/ovl_En_Zl1/z_en_zl1.c
@@ -52,8 +52,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK1,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 20, 46, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Zl3/z_en_zl3.c b/src/overlays/actors/ovl_En_Zl3/z_en_zl3.c
index dc1f5ea812..08620c6022 100644
--- a/src/overlays/actors/ovl_En_Zl3/z_en_zl3.c
+++ b/src/overlays/actors/ovl_En_Zl3/z_en_zl3.c
@@ -32,8 +32,8 @@ static ColliderCylinderInitType1 sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 25, 80, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Zl4/z_en_zl4.c b/src/overlays/actors/ovl_En_Zl4/z_en_zl4.c
index 95ba59deb7..00fdde50aa 100644
--- a/src/overlays/actors/ovl_En_Zl4/z_en_zl4.c
+++ b/src/overlays/actors/ovl_En_Zl4/z_en_zl4.c
@@ -83,8 +83,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 10, 44, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_En_Zo/z_en_zo.c b/src/overlays/actors/ovl_En_Zo/z_en_zo.c
index b80f97ad09..e71af51b68 100644
--- a/src/overlays/actors/ovl_En_Zo/z_en_zo.c
+++ b/src/overlays/actors/ovl_En_Zo/z_en_zo.c
@@ -290,8 +290,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 26, 64, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Fishing/z_fishing.c b/src/overlays/actors/ovl_Fishing/z_fishing.c
index 5603569363..7181accf39 100644
--- a/src/overlays/actors/ovl_Fishing/z_fishing.c
+++ b/src/overlays/actors/ovl_Fishing/z_fishing.c
@@ -200,8 +200,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -211,8 +211,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -222,8 +222,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -233,8 +233,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -244,8 +244,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -255,8 +255,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -266,8 +266,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -277,8 +277,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -288,8 +288,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -299,8 +299,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -310,8 +310,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
@@ -321,8 +321,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[12] = {
             ELEMTYPE_UNK0,
             { 0xFFCFFFFF, 0x00, 0x10 },
             { 0xFFCFFFFF, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_NONE,
+            ATELEM_NONE,
+            ACELEM_NONE,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 30 }, 100 },
diff --git a/src/overlays/actors/ovl_Item_Shield/z_item_shield.c b/src/overlays/actors/ovl_Item_Shield/z_item_shield.c
index aefb205dd3..acb8dbee3c 100644
--- a/src/overlays/actors/ovl_Item_Shield/z_item_shield.c
+++ b/src/overlays/actors/ovl_Item_Shield/z_item_shield.c
@@ -31,8 +31,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000004, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 15, 15, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Magic_Fire/z_magic_fire.c b/src/overlays/actors/ovl_Magic_Fire/z_magic_fire.c
index 0e32deee95..e861cc84e0 100644
--- a/src/overlays/actors/ovl_Magic_Fire/z_magic_fire.c
+++ b/src/overlays/actors/ovl_Magic_Fire/z_magic_fire.c
@@ -57,8 +57,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00020000, 0x00, 0x01 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { 9, 9, 0, { 0, 0, 0 } },
@@ -133,9 +133,9 @@ void MagicFire_Update(Actor* thisx, PlayState* play) {
     }
 
     if (this->action == DF_ACTION_EXPAND_SLOWLY) {
-        this->collider.elem.toucher.damage = this->actionTimer + 25;
+        this->collider.elem.atDmgInfo.damage = this->actionTimer + 25;
     } else if (this->action == DF_ACTION_STOP_EXPANDING) {
-        this->collider.elem.toucher.damage = this->actionTimer;
+        this->collider.elem.atDmgInfo.damage = this->actionTimer;
     }
     Collider_UpdateCylinder(&this->actor, &this->collider);
     this->collider.dim.radius = (this->actor.scale.x * 325.0f);
diff --git a/src/overlays/actors/ovl_Mir_Ray/z_mir_ray.c b/src/overlays/actors/ovl_Mir_Ray/z_mir_ray.c
index 38a50a745b..8c200e3dac 100644
--- a/src/overlays/actors/ovl_Mir_Ray/z_mir_ray.c
+++ b/src/overlays/actors/ovl_Mir_Ray/z_mir_ray.c
@@ -57,8 +57,8 @@ static ColliderQuadInit sQuadInit = {
         ELEMTYPE_UNK0,
         { 0x00200000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -70,8 +70,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00200000, 0x00, 0x00 },
             { 0x00000000, 0x00, 0x00 },
-            TOUCH_ON | TOUCH_SFX_NORMAL,
-            BUMP_NONE,
+            ATELEM_ON | ATELEM_SFX_NORMAL,
+            ACELEM_NONE,
             OCELEM_NONE,
         },
         { 0, { { 0, 0, 0 }, 50 }, 100 },
diff --git a/src/overlays/actors/ovl_Obj_Bean/z_obj_bean.c b/src/overlays/actors/ovl_Obj_Bean/z_obj_bean.c
index ba2521531d..7a42022b69 100644
--- a/src/overlays/actors/ovl_Obj_Bean/z_obj_bean.c
+++ b/src/overlays/actors/ovl_Obj_Bean/z_obj_bean.c
@@ -97,8 +97,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 64, 30, -31, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Obj_Bombiwa/z_obj_bombiwa.c b/src/overlays/actors/ovl_Obj_Bombiwa/z_obj_bombiwa.c
index 8428f34675..dc7cd70d92 100644
--- a/src/overlays/actors/ovl_Obj_Bombiwa/z_obj_bombiwa.c
+++ b/src/overlays/actors/ovl_Obj_Bombiwa/z_obj_bombiwa.c
@@ -43,8 +43,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x4FC1FFFE, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 55, 70, 0, { 0 } },
@@ -125,7 +125,7 @@ void ObjBombiwa_Update(Actor* thisx, PlayState* play) {
     s32 pad;
 
     if ((func_80033684(play, &this->actor) != NULL) ||
-        ((this->collider.base.acFlags & AC_HIT) && (this->collider.elem.acHitElem->toucher.dmgFlags & DMG_HAMMER))) {
+        ((this->collider.base.acFlags & AC_HIT) && (this->collider.elem.acHitElem->atDmgInfo.dmgFlags & DMG_HAMMER))) {
         ObjBombiwa_Break(this, play);
         Flags_SetSwitch(play, this->actor.params & 0x3F);
         SfxSource_PlaySfxAtFixedWorldPos(play, &this->actor.world.pos, 80, NA_SE_EV_WALL_BROKEN);
diff --git a/src/overlays/actors/ovl_Obj_Comb/z_obj_comb.c b/src/overlays/actors/ovl_Obj_Comb/z_obj_comb.c
index 69b311e486..1c071363cf 100644
--- a/src/overlays/actors/ovl_Obj_Comb/z_obj_comb.c
+++ b/src/overlays/actors/ovl_Obj_Comb/z_obj_comb.c
@@ -38,8 +38,8 @@ static ColliderJntSphElementInit sJntSphElementsInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x4001FFFE, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 15 }, 100 },
@@ -176,7 +176,7 @@ void ObjComb_Wait(ObjComb* this, PlayState* play) {
 
     if (this->collider.base.acFlags & AC_HIT) {
         this->collider.base.acFlags &= ~AC_HIT;
-        dmgFlags = this->collider.elements[0].base.acHitElem->toucher.dmgFlags;
+        dmgFlags = this->collider.elements[0].base.acHitElem->atDmgInfo.dmgFlags;
         if (dmgFlags & (DMG_HAMMER | DMG_ARROW | DMG_SLINGSHOT | DMG_DEKU_STICK)) {
             this->unk_1B0 = 1500;
         } else {
diff --git a/src/overlays/actors/ovl_Obj_Hamishi/z_obj_hamishi.c b/src/overlays/actors/ovl_Obj_Hamishi/z_obj_hamishi.c
index cae5d27338..3eb9e3347d 100644
--- a/src/overlays/actors/ovl_Obj_Hamishi/z_obj_hamishi.c
+++ b/src/overlays/actors/ovl_Obj_Hamishi/z_obj_hamishi.c
@@ -39,8 +39,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x4FC1FFF6, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 50, 70, 0, { 0, 0, 0 } },
@@ -170,7 +170,7 @@ void ObjHamishi_Update(Actor* thisx, PlayState* play) {
 
     ObjHamishi_Shake(this);
 
-    if ((this->collider.base.acFlags & AC_HIT) && (this->collider.elem.acHitElem->toucher.dmgFlags & DMG_HAMMER)) {
+    if ((this->collider.base.acFlags & AC_HIT) && (this->collider.elem.acHitElem->atDmgInfo.dmgFlags & DMG_HAMMER)) {
         this->collider.base.acFlags &= ~AC_HIT;
         this->hitCount++;
         if (this->hitCount < 2) {
diff --git a/src/overlays/actors/ovl_Obj_Hana/z_obj_hana.c b/src/overlays/actors/ovl_Obj_Hana/z_obj_hana.c
index 76ce2203c1..6dea87f6b3 100644
--- a/src/overlays/actors/ovl_Obj_Hana/z_obj_hana.c
+++ b/src/overlays/actors/ovl_Obj_Hana/z_obj_hana.c
@@ -39,8 +39,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000000, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_NONE,
+        ATELEM_NONE,
+        ACELEM_NONE,
         OCELEM_ON,
     },
     { 8, 10, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Obj_Ice_Poly/z_obj_ice_poly.c b/src/overlays/actors/ovl_Obj_Ice_Poly/z_obj_ice_poly.c
index 04a3096d5c..736ba66f77 100644
--- a/src/overlays/actors/ovl_Obj_Ice_Poly/z_obj_ice_poly.c
+++ b/src/overlays/actors/ovl_Obj_Ice_Poly/z_obj_ice_poly.c
@@ -42,8 +42,8 @@ static ColliderCylinderInit sCylinderInitIce = {
         ELEMTYPE_UNK0,
         { 0xFFCFFFFF, 0x02, 0x00 },
         { 0x00020800, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NONE,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 50, 120, 0, { 0, 0, 0 } },
@@ -62,8 +62,8 @@ static ColliderCylinderInit sCylinderInitHard = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x4E01F7F6, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 50, 120, 0, { 0, 0, 0 } },
@@ -117,7 +117,7 @@ void ObjIcePoly_Idle(ObjIcePoly* this, PlayState* play) {
     Vec3f pos;
 
     if (this->colliderIce.base.acFlags & AC_HIT) {
-        this->meltTimer = -this->colliderIce.elem.acHitElem->toucher.damage;
+        this->meltTimer = -this->colliderIce.elem.acHitElem->atDmgInfo.damage;
         this->actor.focus.rot.y = this->actor.yawTowardsPlayer;
         OnePointCutscene_Init(play, 5120, 40, &this->actor, CAM_ID_MAIN);
         this->actionFunc = ObjIcePoly_Melt;
diff --git a/src/overlays/actors/ovl_Obj_Kibako/z_obj_kibako.c b/src/overlays/actors/ovl_Obj_Kibako/z_obj_kibako.c
index 9b2fe8884f..c7752a4891 100644
--- a/src/overlays/actors/ovl_Obj_Kibako/z_obj_kibako.c
+++ b/src/overlays/actors/ovl_Obj_Kibako/z_obj_kibako.c
@@ -47,8 +47,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000002, 0x00, 0x01 },
         { 0x4FC00748, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 12, 27, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Obj_Kibako2/z_obj_kibako2.c b/src/overlays/actors/ovl_Obj_Kibako2/z_obj_kibako2.c
index 44b2389993..bfcc4bbf26 100644
--- a/src/overlays/actors/ovl_Obj_Kibako2/z_obj_kibako2.c
+++ b/src/overlays/actors/ovl_Obj_Kibako2/z_obj_kibako2.c
@@ -42,8 +42,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x40000040, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 31, 48, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_Obj_Lightswitch/z_obj_lightswitch.c b/src/overlays/actors/ovl_Obj_Lightswitch/z_obj_lightswitch.c
index e03527e4c7..bb3bb56331 100644
--- a/src/overlays/actors/ovl_Obj_Lightswitch/z_obj_lightswitch.c
+++ b/src/overlays/actors/ovl_Obj_Lightswitch/z_obj_lightswitch.c
@@ -53,8 +53,8 @@ static ColliderJntSphElementInit sColliderJntSphElementInit[] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x00200000, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 0, 0 }, 19 }, 100 },
diff --git a/src/overlays/actors/ovl_Obj_Switch/z_obj_switch.c b/src/overlays/actors/ovl_Obj_Switch/z_obj_switch.c
index 2d513f5c70..23c0e243b9 100644
--- a/src/overlays/actors/ovl_Obj_Switch/z_obj_switch.c
+++ b/src/overlays/actors/ovl_Obj_Switch/z_obj_switch.c
@@ -76,8 +76,8 @@ static ColliderTrisElementInit sRustyFloorTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x40000040, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { -20.0f, 19.0f, -20.0f }, { -20.0f, 19.0f, 20.0f }, { 20.0f, 19.0f, 20.0f } } },
@@ -87,8 +87,8 @@ static ColliderTrisElementInit sRustyFloorTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x40000040, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 20.0f, 19.0f, 20.0f }, { 20.0f, 19.0f, -20.0f }, { -20.0f, 19.0f, -20.0f } } },
@@ -114,8 +114,8 @@ static ColliderTrisElementInit sEyeTrisElementsInit[2] = {
             ELEMTYPE_UNK4,
             { 0x00000000, 0x00, 0x00 },
             { 0x0001F824, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 0.0f, 23.0f, 8.5f }, { -23.0f, 0.0f, 8.5f }, { 0.0f, -23.0f, 8.5f } } },
@@ -125,8 +125,8 @@ static ColliderTrisElementInit sEyeTrisElementsInit[2] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0x0001F824, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_NONE,
         },
         { { { 0.0f, 23.0f, 8.5f }, { 0.0f, -23.0f, 8.5f }, { 23.0f, 0.0f, 8.5f } } },
@@ -152,8 +152,8 @@ static ColliderJntSphElementInit sCrystalJntSphElementInit[1] = {
             ELEMTYPE_UNK0,
             { 0x00000000, 0x00, 0x00 },
             { 0xEFC1FFFE, 0x00, 0x00 },
-            TOUCH_NONE,
-            BUMP_ON,
+            ATELEM_NONE,
+            ACELEM_ON,
             OCELEM_ON,
         },
         { 0, { { 0, 300, 0 }, 20 }, 100 },
diff --git a/src/overlays/actors/ovl_Obj_Syokudai/z_obj_syokudai.c b/src/overlays/actors/ovl_Obj_Syokudai/z_obj_syokudai.c
index f4dfe51a6e..7ea6b73d30 100644
--- a/src/overlays/actors/ovl_Obj_Syokudai/z_obj_syokudai.c
+++ b/src/overlays/actors/ovl_Obj_Syokudai/z_obj_syokudai.c
@@ -41,8 +41,8 @@ static ColliderCylinderInit sCylInitStand = {
         ELEMTYPE_UNK2,
         { 0x00100000, 0x00, 0x00 },
         { 0xEE01FFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON | BUMP_HOOKABLE,
+        ATELEM_NONE,
+        ACELEM_ON | ACELEM_HOOKABLE,
         OCELEM_ON,
     },
     { 12, 45, 0, { 0, 0, 0 } },
@@ -61,8 +61,8 @@ static ColliderCylinderInit sCylInitFlame = {
         ELEMTYPE_UNK2,
         { 0x00000000, 0x00, 0x00 },
         { 0x00020820, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { 15, 45, 45, { 0, 0, 0 } },
@@ -171,7 +171,7 @@ void ObjSyokudai_Update(Actor* thisx, PlayState* play2) {
             }
         }
         if (this->colliderFlame.base.acFlags & AC_HIT) {
-            dmgFlags = this->colliderFlame.elem.acHitElem->toucher.dmgFlags;
+            dmgFlags = this->colliderFlame.elem.acHitElem->atDmgInfo.dmgFlags;
             if (dmgFlags & (DMG_FIRE | DMG_ARROW_NORMAL)) {
                 interactionType = 1;
             }
@@ -197,7 +197,7 @@ void ObjSyokudai_Update(Actor* thisx, PlayState* play2) {
                     arrow = (EnArrow*)this->colliderFlame.base.ac;
                     if ((arrow->actor.update != NULL) && (arrow->actor.id == ACTOR_EN_ARROW)) {
                         arrow->actor.params = 0;
-                        arrow->collider.elem.toucher.dmgFlags = DMG_ARROW_FIRE;
+                        arrow->collider.elem.atDmgInfo.dmgFlags = DMG_ARROW_FIRE;
                     }
                 }
                 if ((0 <= this->litTimer) && (this->litTimer < (50 * litTimeScale + 100)) && (torchType != 0)) {
diff --git a/src/overlays/actors/ovl_Obj_Tsubo/z_obj_tsubo.c b/src/overlays/actors/ovl_Obj_Tsubo/z_obj_tsubo.c
index 0096e67318..e089a11481 100644
--- a/src/overlays/actors/ovl_Obj_Tsubo/z_obj_tsubo.c
+++ b/src/overlays/actors/ovl_Obj_Tsubo/z_obj_tsubo.c
@@ -67,8 +67,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000002, 0x00, 0x01 },
         { 0x4FC1FFFE, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 9, 26, 0, { 0, 0, 0 } },
@@ -246,7 +246,7 @@ void ObjTsubo_Idle(ObjTsubo* this, PlayState* play) {
         ObjTsubo_SpawnCollectible(this, play);
         Actor_Kill(&this->actor);
     } else if ((this->collider.base.acFlags & AC_HIT) &&
-               (this->collider.elem.acHitElem->toucher.dmgFlags &
+               (this->collider.elem.acHitElem->atDmgInfo.dmgFlags &
                 (DMG_SWORD | DMG_RANGED | DMG_HAMMER | DMG_BOOMERANG | DMG_EXPLOSIVE))) {
         ObjTsubo_AirBreak(this, play);
         ObjTsubo_SpawnCollectible(this, play);
diff --git a/src/overlays/actors/ovl_Shot_Sun/z_shot_sun.c b/src/overlays/actors/ovl_Shot_Sun/z_shot_sun.c
index bc7bf1caa6..a6afa9baa9 100644
--- a/src/overlays/actors/ovl_Shot_Sun/z_shot_sun.c
+++ b/src/overlays/actors/ovl_Shot_Sun/z_shot_sun.c
@@ -52,8 +52,8 @@ static ColliderCylinderInit sCylinderInit = {
         ELEMTYPE_UNK0,
         { 0x00000000, 0x00, 0x00 },
         { 0x00000020, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 30, 60, 0, { 0, 0, 0 } },
diff --git a/src/overlays/actors/ovl_player_actor/z_player.c b/src/overlays/actors/ovl_player_actor/z_player.c
index 4c87d44e01..ece01de630 100644
--- a/src/overlays/actors/ovl_player_actor/z_player.c
+++ b/src/overlays/actors/ovl_player_actor/z_player.c
@@ -4007,12 +4007,12 @@ s32 func_80837818(Player* this) {
 }
 
 void func_80837918(Player* this, s32 quadIndex, u32 dmgFlags) {
-    this->meleeWeaponQuads[quadIndex].elem.toucher.dmgFlags = dmgFlags;
+    this->meleeWeaponQuads[quadIndex].elem.atDmgInfo.dmgFlags = dmgFlags;
 
     if (dmgFlags == DMG_DEKU_STICK) {
-        this->meleeWeaponQuads[quadIndex].elem.toucherFlags = TOUCH_ON | TOUCH_NEAREST | TOUCH_SFX_WOOD;
+        this->meleeWeaponQuads[quadIndex].elem.atElemFlags = ATELEM_ON | ATELEM_NEAREST | ATELEM_SFX_WOOD;
     } else {
-        this->meleeWeaponQuads[quadIndex].elem.toucherFlags = TOUCH_ON | TOUCH_NEAREST;
+        this->meleeWeaponQuads[quadIndex].elem.atElemFlags = ATELEM_ON | ATELEM_NEAREST;
     }
 }
 
@@ -4394,7 +4394,7 @@ s32 func_808382DC(Player* this, PlayState* play) {
                     }
                 }
 
-                if (sp64 && (this->shieldQuad.elem.acHitElem->toucher.effect == 1)) {
+                if (sp64 && (this->shieldQuad.elem.acHitElem->atDmgInfo.effect == 1)) {
                     func_8083819C(this, play);
                 }
 
@@ -9737,8 +9737,8 @@ static ColliderCylinderInit D_80854624 = {
         ELEMTYPE_UNK1,
         { 0x00000000, 0x00, 0x00 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_NONE,
-        BUMP_ON,
+        ATELEM_NONE,
+        ACELEM_ON,
         OCELEM_ON,
     },
     { 12, 60, 0, { 0, 0, 0 } },
@@ -9757,8 +9757,8 @@ static ColliderQuadInit D_80854650 = {
         ELEMTYPE_UNK2,
         { 0x00000100, 0x00, 0x01 },
         { 0xFFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_NONE,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_NONE,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
@@ -9777,8 +9777,8 @@ static ColliderQuadInit D_808546A0 = {
         ELEMTYPE_UNK2,
         { 0x00100000, 0x00, 0x00 },
         { 0xDFCFFFFF, 0x00, 0x00 },
-        TOUCH_ON | TOUCH_SFX_NORMAL,
-        BUMP_ON,
+        ATELEM_ON | ATELEM_SFX_NORMAL,
+        ACELEM_ON,
         OCELEM_NONE,
     },
     { { { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } } },
diff --git a/tools/disasm/gc-eu-mq/functions.txt b/tools/disasm/gc-eu-mq/functions.txt
index 7b75f6ab7c..88a45efc38 100644
--- a/tools/disasm/gc-eu-mq/functions.txt
+++ b/tools/disasm/gc-eu-mq/functions.txt
@@ -900,13 +900,13 @@ Collider_SetBase = 0x80049B10; // type:func
 Collider_ResetATBase = 0x80049B54; // type:func
 Collider_ResetACBase = 0x80049B70; // type:func
 Collider_ResetOCBase = 0x80049B8C; // type:func
-Collider_InitElementTouch = 0x80049BB4; // type:func
-Collider_DestroyElementTouch = 0x80049BDC; // type:func
-Collider_SetElementTouch = 0x80049BF0; // type:func
+Collider_InitElementDamageInfoAT = 0x80049BB4; // type:func
+Collider_DestroyElementDamageInfoAT = 0x80049BDC; // type:func
+Collider_SetElementDamageInfoAT = 0x80049BF0; // type:func
 Collider_ResetATElement_Unk = 0x80049C18; // type:func
-Collider_InitElementBump = 0x80049C28; // type:func
-Collider_DestroyElementBump = 0x80049C58; // type:func
-Collider_SetElementBump = 0x80049C6C; // type:func
+Collider_InitElementDamageInfoAC = 0x80049C28; // type:func
+Collider_DestroyElementDamageInfoAC = 0x80049C58; // type:func
+Collider_SetElementDamageInfoAC = 0x80049C6C; // type:func
 Collider_InitElement = 0x80049C94; // type:func
 Collider_DestroyElement = 0x80049D14; // type:func
 Collider_SetElement = 0x80049D54; // type:func
@@ -991,8 +991,8 @@ CollisionCheck_SetAC_SAC = 0x8004BBE0; // type:func
 CollisionCheck_SetOC = 0x8004BCF0; // type:func
 CollisionCheck_SetOC_SAC = 0x8004BDD0; // type:func
 CollisionCheck_SetOCLine = 0x8004BEE0; // type:func
-CollisionCheck_SkipElementTouch = 0x8004BF6C; // type:func
-CollisionCheck_SkipElementBump = 0x8004BF90; // type:func
+CollisionCheck_IsElementNotAT = 0x8004BF6C; // type:func
+CollisionCheck_IsElementNotAC = 0x8004BF90; // type:func
 CollisionCheck_NoSharedFlags = 0x8004BFB4; // type:func
 CollisionCheck_NoBlood = 0x8004BFDC; // type:func
 CollisionCheck_BlueBlood = 0x8004BFF0; // type:func
@@ -10599,7 +10599,7 @@ EnReeba_Surface = 0x80AC5628; // type:func
 EnReeba_Move = 0x80AC5848; // type:func
 EnReeba_SetupMoveBig = 0x80AC5964; // type:func
 EnReeba_MoveBig = 0x80AC5988; // type:func
-EnReeba_Bumped = 0x80AC5BF8; // type:func
+EnReeba_Recoiled = 0x80AC5BF8; // type:func
 EnReeba_SetupSink = 0x80AC5C64; // type:func
 EnReeba_Sink = 0x80AC5CBC; // type:func
 EnReeba_SetupDamaged = 0x80AC5DCC; // type:func