diff --git a/js/Makefile b/js/Makefile
index 9fc5040..a98455a 100644
--- a/js/Makefile
+++ b/js/Makefile
@@ -53,7 +53,6 @@ Bouncing:
 
 Multisphere:
 	$(CLOSURE) $(OPT) \
-		--js StaticPath.js \
 		--js Camera.js \
 		--js Cube.js \
 		--js multisphere/MultiSphere.js \
@@ -61,7 +60,6 @@ Multisphere:
 
 StreamingSimulator:
 	$(CLOSURE) $(OPT) \
-		--js StaticPath.js \
 		--js Camera.js \
 		--js Cube.js \
 		--js ProgressiveSphere.js \
@@ -71,7 +69,7 @@ StreamingSimulator:
 PrototypeTools:
 	$(CLOSURE) $(OPT) \
 		--js History.js \
-		--js StaticPath.js \
+		--js StartCanvas.js \
 		--js Hermite.js \
 		--js Camera.js \
 		--js PointerCamera.js \
diff --git a/js/PointerCamera.js b/js/PointerCamera.js
index b5d2f50..92241c5 100644
--- a/js/PointerCamera.js
+++ b/js/PointerCamera.js
@@ -131,6 +131,11 @@ var PointerCamera = function() {
      */
     this.pointerLocked = false;
 
+    /**
+     *
+     */
+    this.listenerTarget = listenerTarget;
+
     // Set events from the document
     var self = this;
     var onKeyDown = function(event) {self.onKeyDown(event);};
@@ -141,17 +146,17 @@ var PointerCamera = function() {
 
     document.addEventListener('keydown', onKeyDown, false);
     document.addEventListener('keyup', onKeyUp, false);
-    document.addEventListener('mousemove', function(event) {self.onMouseMovePointer(event);}, false);
 
     document.addEventListener('pointerlockchange', function(event) { self.onPointerLockChange(event); }, false);
     document.addEventListener('mozpointerlockchange', function(event) { self.onPointerLockChange(event); }, false);
     document.addEventListener('webkitpointerlockchange', function(event) { self.onPointerLockChange(event); }, false);
 
+    document.addEventListener('mousemove', function(event) {self.onMouseMovePointer(event);}, false);
+
     listenerTarget.addEventListener('mousedown', function() {self.lockPointer();}, false);
     listenerTarget.addEventListener('mousedown', onMouseDown, false);
     listenerTarget.addEventListener('mousemove', onMouseMove, false);
     listenerTarget.addEventListener('mouseup', onMouseUp, false);
-    // listenerTarget.addEventListener('mouseup', function() { console.log("mouseup");}, false);
     listenerTarget.addEventListener('mouseout', onMouseUp, false);
 
     /**
@@ -183,44 +188,69 @@ PointerCamera.prototype.constructor = PointerCamera;
 PointerCamera.prototype.lockPointer = function() {
 
     if (this.shouldLock) {
-        document.documentElement.requestPointerLock =
-            document.documentElement.requestPointerLock ||
-            document.documentElement.mozRequestPointerLock ||
-            document.documentElement.webkitRequestPointerLock;
+        this.renderer.domElement.requestPointerLock =
+            this.renderer.domElement.requestPointerLock ||
+            this.renderer.domElement.mozRequestPointerLock ||
+            this.renderer.domElement.webkitRequestPointerLock;
 
-        if (document.documentElement.requestPointerLock) {
+        if (this.renderer.domElement.requestPointerLock) {
 
-            document.documentElement.requestPointerLock();
-            this.pointerLocked = true;
-            this.mousePointer.render();
+            this.renderer.domElement.requestPointerLock();
 
-            this.mouse.x = this.renderer.domElement.width/2;
-            this.mouse.y = this.renderer.domElement.height/2;
         }
 
     }
 
 }
 
+/**
+ * Check that the pointer is locked or not, and updated locked attribute
+ * @returns true if the pointer is locked, false otherwise
+ */
+PointerCamera.prototype.isLocked = function() {
+    var toto =
+        document.pointerLockElement === this.renderer.domElement ||
+        document.mozPointerLockElement === this.renderer.domElement ||
+        document.webkitPointerLockElement === this.renderer.domElement;
+
+    return toto;
+
+}
+
 /**
  * Update the camera when the pointer lock changes state
  */
 PointerCamera.prototype.onPointerLockChange = function() {
 
-    document.pointerLockElement =
-        document.pointerLockElement ||
-        document.mozPointerLockElement ||
-        document.webkitPointerLockElement;
+    if (this.isLocked()) {
 
-    if (!document.pointerLockElement) {
+        // The pointer is locked : adapt the state of the camera
+        this.pointerLocked = true;
+        this.mousePointer.render();
+
+        this.mouse.x = this.renderer.domElement.width/2;
+        this.mouse.y = this.renderer.domElement.height/2;
+
+        // Remove start canvas
+        this.startCanvas.clear();
+
+    } else {
 
-        this.dragging = false;
         this.pointerLocked = false;
         this.mousePointer.clear();
 
+        this.theta = this.previousTheta;
+        this.phi = this.previousPhi;
+
         this.mouseMove.x = 0;
         this.mouseMove.y = 0;
 
+        // Draw start canvas only if should lock
+        if (this.shouldLock)
+            this.startCanvas.render();
+        else
+            this.startCanvas.clear();
+
     }
 
 }
@@ -282,19 +312,23 @@ PointerCamera.prototype.hermiteMotion = function(time) {
  * @param {Number} time number of milliseconds between the previous and the next frame
  */
 PointerCamera.prototype.normalMotion = function(time) {
+
     // Update angles
     if (this.motion.increasePhi)   {this.phi   += this.sensitivity * time / 20; this.changed = true; }
     if (this.motion.decreasePhi)   {this.phi   -= this.sensitivity * time / 20; this.changed = true; }
     if (this.motion.increaseTheta) {this.theta += this.sensitivity * time / 20; this.changed = true; }
     if (this.motion.decreaseTheta) {this.theta -= this.sensitivity * time / 20; this.changed = true; }
 
-    if ( this.pointerLocked || this.dragging) {
-        this.theta += this.mouseMove.x * 20 / time;
-        this.phi   -= this.mouseMove.y * 20 / time;
+    if ( this.isLocked() || this.dragging) {
+
+        this.theta += (this.mouseMove.x * 20 / time);
+        this.phi   -= (this.mouseMove.y * 20 / time);
 
         this.mouseMove.x = 0;
         this.mouseMove.y = 0;
 
+        this.vectorsFromAngles();
+
         this.changed = true;
 
         if (this.shouldLogCameraAngles) {
@@ -546,7 +580,9 @@ PointerCamera.prototype.onKeyUp = function(event) {
  * @param {event} event the event to manage
  */
 PointerCamera.prototype.onMouseDown = function(event) {
+
     if (!this.shouldLock) {
+
         this.mouse.x = ( ( event.clientX - this.renderer.domElement.offsetLeft ) / this.renderer.domElement.width ) * 2 - 1;
         this.mouse.y = - ( ( event.clientY - this.renderer.domElement.offsetTop ) / this.renderer.domElement.height ) * 2 + 1;
 
@@ -560,6 +596,7 @@ PointerCamera.prototype.onMouseDown = function(event) {
  * @param {event} event the event to manage
  */
 PointerCamera.prototype.onMouseMove = function(event) {
+
     if (!this.shouldLock && this.dragging) {
         var mouse = {x: this.mouse.x, y: this.mouse.y};
         this.mouse.x = ( ( event.clientX - this.renderer.domElement.offsetLeft ) / this.renderer.domElement.width ) * 2 - 1;
@@ -577,7 +614,11 @@ PointerCamera.prototype.onMouseMove = function(event) {
  */
 PointerCamera.prototype.onMouseMovePointer = function(e) {
 
-    if (this.pointerLocked) {
+    if (this.isLocked) {
+
+        // Backup theta and phi
+        this.previousTheta = this.theta;
+        this.previousPhi = this.phi;
 
         this.mouseMove.x = e.movementX || e.mozMovementX || e.webkitMovementX || 0;
         this.mouseMove.y = e.movementY || e.mozMovementY || e.webkitMovementY || 0;
diff --git a/js/StartCanvas.js b/js/StartCanvas.js
new file mode 100644
index 0000000..e194dba
--- /dev/null
+++ b/js/StartCanvas.js
@@ -0,0 +1,44 @@
+var StartCanvas = function(camera) {
+
+    this.domElement = document.createElement('canvas');
+    this.domElement.style.position = 'absolute';
+    this.domElement.style.cssFloat = 'top-left';
+    this.ctx = this.domElement.getContext('2d');
+    this.shown = false;
+
+    camera.startCanvas = this;
+
+}
+
+StartCanvas.prototype.render = function() {
+
+    if (!this.shown) {
+
+        this.ctx.fillStyle = 'white'
+        this.ctx.globalAlpha = 0.7;
+        this.ctx.fillRect(0,0,this.domElement.width, this.domElement.height);
+
+        this.ctx.font = '30px Verdana'
+        this.ctx.globalAlpha = 1;
+        this.ctx.fillStyle = 'black';
+        this.ctx.fillText('Click here to lock the pointer !', container_size.width()/3.25, container_size.height()/2-10);
+
+
+        this.shown = true;
+
+    }
+
+}
+
+StartCanvas.prototype.clear = function() {
+
+    if (this.shown) {
+
+        // Clear canvas
+        this.domElement.width = this.domElement.width;
+
+        this.shown = false;
+
+    }
+
+}
diff --git a/js/prototype/ButtonManager.js b/js/prototype/ButtonManager.js
index b9cec3f..d2e3f95 100644
--- a/js/prototype/ButtonManager.js
+++ b/js/prototype/ButtonManager.js
@@ -33,6 +33,7 @@ var ButtonManager = function(cameras, previewer) {
 
         self.pointerLockElement.onchange = function() {
             self.cameras.mainCamera().shouldLock = self.pointerLockElement.checked;
+            self.cameras.mainCamera().onPointerLockChange();
         }
 
         self.showarrowsElement.onchange = function() {self.showArrows = self.showarrowsElement.checked;}
diff --git a/js/prototype/main.js b/js/prototype/main.js
index ae509b5..c81a7cb 100644
--- a/js/prototype/main.js
+++ b/js/prototype/main.js
@@ -110,13 +110,21 @@ function init() {
     pointer.domElement.width = container_size.width();
     pointer.domElement.height = container_size.height();
 
+    //
+    var startCanvas = new StartCanvas(camera1);
+    startCanvas.domElement.width = container_size.width();
+    startCanvas.domElement.height = container_size.height();
+
     // Add elements to page
     container.appendChild( stats.domElement );
+    container.appendChild(Coin.domElement);
+    container.appendChild(startCanvas.domElement);
     container.appendChild(pointer.domElement);
     container.appendChild(previewer.domElement);
-    container.appendChild(Coin.domElement);
     container.appendChild(renderer.domElement);
 
+    startCanvas.render();
+
     cameras = initMainScene(camera1, scene, static_path, coins);
     // cameras = initPeach(camera1, scene, static_path, coins);
     // cameras = initBobomb(camera1, scene, static_path, coins);