diff --git a/lib/Chuck/Collision/Detector.js b/lib/Chuck/Collision/Detector.js
new file mode 100644
index 0000000..d6e211b
--- /dev/null
+++ b/lib/Chuck/Collision/Detector.js
@@ -0,0 +1,38 @@
+define(["Box2D/Box2D"], function(Box2D) {
+
+	function Detector(me) {
+		this.me = me;
+    
+	    this.listener = new Box2D.Dynamics.b2ContactListener();
+	    this.listener.chuckDetector = this;
+	    this.listener.BeginContact = this.BeginContact;
+	    this.listener.PostSolve = this.PostSolve;
+	    this.listener.EndContact = this.EndContact;
+	}
+
+	Detector.prototype.getListener = function() {
+	    return this.listener;
+	}
+
+	Detector.prototype.handleStand = function(point, isColliding) {
+	    if (point.GetFixtureA().GetUserData() == 'myFeet' || point.GetFixtureB().GetUserData() == 'myFeet')  {
+	        this.me.onFootSensorDetection(isColliding);
+	    }
+	}
+
+	/** Extension **/
+
+	Detector.prototype.BeginContact = function(point) {
+	    this.chuckDetector.handleStand(point, true);
+	}
+
+	Detector.prototype.PostSolve = function(point, impulse) {
+	    this.chuckDetector.handleStand(point, true);
+	}
+
+	Detector.prototype.EndContact = function(point) {
+	    this.chuckDetector.handleStand(point, false);
+	}
+
+	return Detector;
+});
\ No newline at end of file
diff --git a/lib/Chuck/Physics/Engine.js b/lib/Chuck/Physics/Engine.js
index 4bab228..8dc0166 100644
--- a/lib/Chuck/Physics/Engine.js
+++ b/lib/Chuck/Physics/Engine.js
@@ -1,12 +1,12 @@
-define(["Chuck/Settings", "Box2D/Box2D"], function(Settings, Box2D){
+define(["Chuck/Settings", "Box2D/Box2D", "Chuck/Collision/Detector"], function(Settings, Box2D, CollisionDetector){
 
 	function Engine () {
-	    this._world;
+	    this.world;
 	    this.init();
 	}
 
 	Engine.prototype.init = function() {
-	    this._world = new Box2D.Dynamics.b2World(new Box2D.Common.Math.b2Vec2(0, Settings.BOX2D_GRAVITY), Settings.BOX2D_ALLOW_SLEEP);
+	    this.world = new Box2D.Dynamics.b2World(new Box2D.Common.Math.b2Vec2(0, Settings.BOX2D_GRAVITY), Settings.BOX2D_ALLOW_SLEEP);
 
 	    if(Settings.IS_BROWSER_ENVIRONMENT) {
 	    	this.setupDebugDraw();
@@ -14,14 +14,13 @@ define(["Chuck/Settings", "Box2D/Box2D"], function(Settings, Box2D){
 	}
 
 	Engine.prototype.getWorld = function() {
-	    return this._world;
+	    return this.world;
 	}
 
 	Engine.prototype.setCollisionDetector = function(me) {
-		/*
-	    var cd = new Chuck.Collision.Detector(me);
-	    var listener = cd.getListener();
-	    this._world.SetContactListener(listener);*/
+		
+	    var detector = new CollisionDetector(me);
+	    this.world.SetContactListener(detector.getListener());
 	}
 
 	Engine.prototype.setupDebugDraw = function() {
@@ -46,18 +45,18 @@ define(["Chuck/Settings", "Box2D/Box2D"], function(Settings, Box2D){
 		    //| Box2D.Dynamics.b2DebugDraw.e_pairBit
 		);
 
-	    this._world.SetDebugDraw(debugDraw);
-	    this._world.SetWarmStarting(true);
+	    this.world.SetDebugDraw(debugDraw);
+	    this.world.SetWarmStarting(true);
 	}
 
 	Engine.prototype.createBody = function(bodyDef) {
-	    return this._world.CreateBody(bodyDef);
+	    return this.world.CreateBody(bodyDef);
 	}
 
 	Engine.prototype.update = function() {
-	    this._world.Step(Settings.BOX2D_TIME_STEP, Settings.BOX2D_VELOCITY_ITERATIONS, Settings.BOX2D_POSITION_ITERATIONS);
-	    this._world.ClearForces();
-	    this._world.DrawDebugData();
+	    this.world.Step(Settings.BOX2D_TIME_STEP, Settings.BOX2D_VELOCITY_ITERATIONS, Settings.BOX2D_POSITION_ITERATIONS);
+	    this.world.ClearForces();
+	    this.world.DrawDebugData();
 	}
 
 	return Engine;
diff --git a/lib/Chuck/Processor.js b/lib/Chuck/Processor.js
index 565150c..aeec0c4 100644
--- a/lib/Chuck/Processor.js
+++ b/lib/Chuck/Processor.js
@@ -28,7 +28,7 @@ define(requires, function(PhysicsEngine, Player, InputControlUnit, Settings, Box
 	Processor.prototype.init = function() {
 
 	    this._physicsEngine = new PhysicsEngine();
-	    this._makeBox();
+	    //this._makeBox();
 	    
 		if(Settings.IS_BROWSER_ENVIRONMENT) {
 
@@ -39,9 +39,11 @@ define(requires, function(PhysicsEngine, Player, InputControlUnit, Settings, Box
 	  	    //this._camera = Camera.getInstance()
 	  	    //this._camera.follow(this._me);
 	  	    //this._repository = Repository.getInstance();
-	  	    //this._physicsEngine.setCollisionDetector(this._me);
+	  	    this._physicsEngine.setCollisionDetector(this._me);
 		}
 	    
+	
+
 	    //new Chuck.Loader.Level(this._physicsEngine);u
 	    //new Items();