diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0c63dd0..346d9ea 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,6 +13,7 @@ find_package(Boost 1.35.0 REQUIRED)
 
 add_definitions(
 	${PNG_DEFINITIONS}
+	-DWITH_VERBOSE_COLLIDER
 	-DWITH_VERBOSE_OBS_MANAGER
 )
 
@@ -63,10 +64,12 @@ add_executable(${PROJECT_NAME}
 	src/platformsystem.cpp
 	src/movers/moverworld.cpp
 	src/line.cpp
+	src/collider.cpp
 )
 
 target_link_libraries(${PROJECT_NAME}
 	${SDL2_LIBRARIES}
 	physfs
 	${PNG_LIBRARIES}
+	pthread
 )
diff --git a/src/collider.cpp b/src/collider.cpp
new file mode 100644
index 0000000..9bb9a17
--- /dev/null
+++ b/src/collider.cpp
@@ -0,0 +1,101 @@
+/*
+	Copyright 2014 Michele "King_DuckZ" Santullo
+
+	This file is part of CloonelJump.
+
+	CloonelJump is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	CloonelJump is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with CloonelJump.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "collider.hpp"
+#include <thread>
+#include <atomic>
+#include <vector>
+#include <functional>
+#include <ciso646>
+#include <cassert>
+
+#if defined(WITH_VERBOSE_COLLIDER) && !defined(NDEBUG)
+#define VERBOSE_COLLIDER
+#include <iostream>
+#endif
+
+namespace cloonel {
+	struct Collider::LocalData {
+		LocalData ( void );
+		~LocalData ( void ) noexcept = default;
+
+		std::thread th;
+		bool stop;
+		volatile bool started;
+	};
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	Collider::LocalData::LocalData() :
+		th(),
+		stop(false),
+		started(false)
+	{
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	Collider::Collider() :
+		m_localData(new LocalData)
+	{
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	Collider::~Collider() noexcept {
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	void Collider::BeginCollisionChecks() {
+		if (not m_localData->started) {
+			m_localData->started = true;
+			m_localData->th = std::thread(std::bind(&Collider::RunCollisionTests, this));
+		}
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	void Collider::StopCollisionChecks() {
+#if defined(VERBOSE_COLLIDER)
+		std::cout << "Stopping collision checks...\n";
+#endif
+		m_localData->stop = true;
+		m_localData->th.join();
+	}
+
+	///--------------------------------------------------------------------------
+	///--------------------------------------------------------------------------
+	void Collider::RunCollisionTests() {
+#if defined(VERBOSE_COLLIDER)
+		std::cout << "Collision checks started\n";
+#endif
+		assert(not m_localData->stop);
+		do {
+		} while (not m_localData->stop);
+		m_localData->stop = false;
+#if defined(VERBOSE_COLLIDER)
+		std::cout << "Collision checks stopped\n";
+#endif
+	}
+} //namespace cloonel
+
+#if defined(VERBOSE_COLLIDER)
+#undef VERBOSE_COLLIDER
+#endif
diff --git a/src/collider.hpp b/src/collider.hpp
new file mode 100644
index 0000000..ac2dcd3
--- /dev/null
+++ b/src/collider.hpp
@@ -0,0 +1,46 @@
+/*
+	Copyright 2014 Michele "King_DuckZ" Santullo
+
+	This file is part of CloonelJump.
+
+	CloonelJump is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	CloonelJump is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with CloonelJump.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef id7E6024372BF34999A913A36B6EAB736B
+#define id7E6024372BF34999A913A36B6EAB736B
+
+#include "observersmanager.hpp"
+#include <memory>
+
+namespace cloonel {
+	class HorzCollisionBar;
+
+	class Collider {
+	public:
+		Collider ( void );
+		~Collider ( void ) noexcept;
+
+		void BeginCollisionChecks ( void );
+		void StopCollisionChecks ( void );
+
+	private:
+		struct LocalData;
+
+		void RunCollisionTests ( void );
+
+		const std::unique_ptr<LocalData> m_localData;
+	};
+} //namespace cloonel
+
+#endif
diff --git a/src/gameplaysceneclassic.cpp b/src/gameplaysceneclassic.cpp
index 5ccbfc4..1b1c43a 100644
--- a/src/gameplaysceneclassic.cpp
+++ b/src/gameplaysceneclassic.cpp
@@ -32,6 +32,7 @@
 #include <algorithm>
 #include <SDL2/SDL_scancode.h>
 #include <ciso646>
+#include <system_error>
 
 namespace cloonel {
 	namespace {
@@ -96,11 +97,20 @@ namespace cloonel {
 
 		const float jumpPower = halfRefHeight * 1.29f;
 		m_moverSine->SetPower(jumpPower);
+
+		m_collider.BeginCollisionChecks();
 	}
 
 	///--------------------------------------------------------------------------
 	///--------------------------------------------------------------------------
 	void GameplaySceneClassic::Destroy() noexcept {
+		try {
+			m_collider.StopCollisionChecks();
+		}
+		catch (const std::system_error e) {
+			std::cerr << "An error occurred while stopping the Collider: " << e.what() << "\n";
+		}
+
 		//Destroy in reverse creation order
 		m_platforms = std::move(std::unique_ptr<PlatformSystem>(nullptr));
 		m_wallpaper = std::move(std::unique_ptr<TiledWallpaper>(nullptr));
@@ -108,6 +118,7 @@ namespace cloonel {
 		m_moverLeftRight = std::move(std::unique_ptr<MoverLeftRight>(nullptr));
 		m_player = std::move(std::unique_ptr<Character>(nullptr));
 		m_moverSine = std::move(std::unique_ptr<MoverSine>(nullptr));
+
 	}
 
 	///--------------------------------------------------------------------------
diff --git a/src/gameplaysceneclassic.hpp b/src/gameplaysceneclassic.hpp
index 31485f2..b10947c 100644
--- a/src/gameplaysceneclassic.hpp
+++ b/src/gameplaysceneclassic.hpp
@@ -21,6 +21,7 @@
 #define idF6FF1F57C36842DC9B20E2F55C507C2E
 
 #include "gameplayscene.hpp"
+#include "collider.hpp"
 #include <memory>
 
 namespace cloonel {
@@ -44,6 +45,7 @@ namespace cloonel {
 	private:
 		virtual void OnPreUpdate ( void );
 
+		Collider m_collider;
 		std::unique_ptr<Character> m_player;
 		std::unique_ptr<MoverSine> m_moverSine;
 		std::unique_ptr<MoverLeftRight> m_moverLeftRight;