diff --git a/app/Game/Client/Collision/Detector.js b/app/Game/Client/Collision/Detector.js
index bd30450..3ed456e 100755
--- a/app/Game/Client/Collision/Detector.js
+++ b/app/Game/Client/Collision/Detector.js
@@ -5,20 +5,11 @@ define([
 
 function (Box2D, Parent) {
 
-    function Detector (me) {
-        Parent.call(this);
-        this.me = me;
+    function Detector (player) {
+        Parent.call(this, player);
     }
 
     Detector.prototype = Object.create(Parent.prototype);
 
-    Detector.prototype.handleStand = function (point, isColliding) {
-        if (point.GetFixtureA().GetUserData() == Detector.IDENTIFIER.PLAYER_FOOT_SENSOR
-         || point.GetFixtureB().GetUserData() == Detector.IDENTIFIER.PLAYER_FOOT_SENSOR)  {
-
-            this.me.onFootSensorDetection(isColliding);
-        }
-    }
-
     return Detector;
 });
\ No newline at end of file
diff --git a/app/Game/Client/GameController.js b/app/Game/Client/GameController.js
index 7849e41..4d50a34 100755
--- a/app/Game/Client/GameController.js
+++ b/app/Game/Client/GameController.js
@@ -65,6 +65,8 @@ function (Parent, PhysicsEngine, ViewController, KeyboardController, Notificatio
         //this.onSpawnPlayer(options);
         this.me = this.players[playerId];
         this.keyboardController = new KeyboardController(this.me, this);
+
+        this.physicsEngine.setCollisionDetector(this.me);
     }
 
     GameController.prototype.onSpawnPlayer = function(options) {
diff --git a/app/Game/Client/Networker.js b/app/Game/Client/Networker.js
index c938712..8f92484 100755
--- a/app/Game/Client/Networker.js
+++ b/app/Game/Client/Networker.js
@@ -28,6 +28,7 @@ function (ProtocolHelper, GameController, User, NotificationCenter) {
         NotificationCenter.on("sendGameCommand", this.sendGameCommand, this);
     }
 
+
     // Socket callbacks
 
     Networker.prototype.onConnect = function () {
@@ -64,6 +65,7 @@ function (ProtocolHelper, GameController, User, NotificationCenter) {
         }
     }
 
+
     // Sending commands
 
     Networker.prototype.sendCommand = function (command, options) {
@@ -76,6 +78,7 @@ function (ProtocolHelper, GameController, User, NotificationCenter) {
         this.sendCommand('gameCommand', message);
     }
 
+
     // Commands from server
 
     Networker.prototype.onUserJoined = function (userId) {
diff --git a/app/Game/Core/Collision/Detector.js b/app/Game/Core/Collision/Detector.js
index 836dfdb..ce87e02 100755
--- a/app/Game/Core/Collision/Detector.js
+++ b/app/Game/Core/Collision/Detector.js
@@ -5,12 +5,14 @@ define([
 
 function (Box2D, Parent) {
 
-    function Detector () {
+    function Detector (player) { // FIXME evtl.bind(this) ?
         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;
+
+        this.player = player;
     }
 
     Detector.IDENTIFIER = {
@@ -27,7 +29,12 @@ function (Box2D, Parent) {
     }
 
     Detector.prototype.handleStand = function (point, isColliding) {
-        throw "Overwrite this function";
+
+        if (point.GetFixtureA().GetUserData() == Detector.IDENTIFIER.PLAYER_FOOT_SENSOR + '-' + this.player.id
+         || point.GetFixtureB().GetUserData() == Detector.IDENTIFIER.PLAYER_FOOT_SENSOR + '-' + this.player.id)  {
+
+            this.player.onFootSensorDetection(isColliding);
+        }
     }
 
     /** Extension **/
diff --git a/app/Game/Core/Physics/Doll.js b/app/Game/Core/Physics/Doll.js
index 287d689..ebb2881 100755
--- a/app/Game/Core/Physics/Doll.js
+++ b/app/Game/Core/Physics/Doll.js
@@ -63,7 +63,7 @@ function (Box2D, Settings, CollisionDetector) {
         feetShape.SetLocalPosition(new Box2D.Common.Math.b2Vec2(0 / Settings.RATIO, 0 / Settings.RATIO));
         fixtureDef.shape = feetShape;
         fixtureDef.isSensor = true;
-        fixtureDef.userData = CollisionDetector.IDENTIFIER.FOOTSENSOR;
+        fixtureDef.userData = CollisionDetector.IDENTIFIER.PLAYER_FOOT_SENSOR + '-' + this.id;
         this.body.CreateFixture(fixtureDef);
 
         this.body.SetActive(false);
diff --git a/app/Game/Core/Physics/Engine.js b/app/Game/Core/Physics/Engine.js
index 6b4d1f5..de67e01 100755
--- a/app/Game/Core/Physics/Engine.js
+++ b/app/Game/Core/Physics/Engine.js
@@ -17,9 +17,9 @@ function (Settings, Box2D, CollisionDetector) {
         return this.world;
     }
 
-    Engine.prototype.setCollisionDetector = function (me) {
+    Engine.prototype.setCollisionDetector = function (player) {
         
-        var detector = new CollisionDetector(me); // FIXME: check if core collision detector works
+        var detector = new CollisionDetector(player); 
         this.world.SetContactListener(detector.getListener());
     }
 
diff --git a/app/Game/Core/Player.js b/app/Game/Core/Player.js
index 3c2b400..bcca2ff 100755
--- a/app/Game/Core/Player.js
+++ b/app/Game/Core/Player.js
@@ -158,12 +158,12 @@ function (Doll, Settings) {
             }
             this.setStanding(true);
         } else {
-        // TODO This needs some more thought to it.
-        // maybe take a look at collision groups for collision detection, 
-        // to group all tiles together
+            // TODO This needs some more thought to it.
+            // maybe take a look at collision groups for collision detection, 
+            // to group all tiles together
 
-        //this.setStanding(false);
-        //this.animate('jumploop');
+            //this.setStanding(false);
+            //this.animate('jumploop');
         }
     }
 
@@ -174,7 +174,7 @@ function (Doll, Settings) {
             this.stop();
         }
 
-        if (!this.doll.getBody().IsAwake()) {
+        if (!this.doll.getBody().IsAwake() && !this.isStanding()) {
             this.setStanding(true);
         }
     }
diff --git a/app/Game/Server/Collision/Detector.js b/app/Game/Server/Collision/Detector.js
index fddbc61..3ed456e 100755
--- a/app/Game/Server/Collision/Detector.js
+++ b/app/Game/Server/Collision/Detector.js
@@ -5,15 +5,11 @@ define([
 
 function (Box2D, Parent) {
 
-    function Detector () {
-        Parent.call(this);
+    function Detector (player) {
+        Parent.call(this, player);
     }
 
     Detector.prototype = Object.create(Parent.prototype);
 
-    Detector.prototype.handleStand = function (point, isColliding) {
-        throw "Implement this function";
-    }
-
     return Detector;
 });
\ No newline at end of file
diff --git a/app/Game/Server/GameController.js b/app/Game/Server/GameController.js
index 1a46e55..44bb984 100755
--- a/app/Game/Server/GameController.js
+++ b/app/Game/Server/GameController.js
@@ -1,6 +1,6 @@
 define([
     "Game/Core/GameController",
-    "Game/Core/Physics/Engine", 
+    "Game/Core/Physics/Engine",
     "Game/Config/Settings", 
     "Game/Server/Control/InputController",
     "Lib/Utilities/RequestAnimFrame",
@@ -61,6 +61,9 @@ function (Parent, PhysicsEngine, Settings, InputController, requestAnimFrame, No
     GameController.prototype.createPlayer = function(user) {
         var player = new Player(user.id, this.physicsEngine);
         player.setInputController(new InputController(player))
+
+        this.physicsEngine.setCollisionDetector(player);
+        
         return player;
     };