diff --git a/src/source/Application.cpp b/src/source/Application.cpp
index b40c972..0ad5702 100644
--- a/src/source/Application.cpp
+++ b/src/source/Application.cpp
@@ -320,12 +320,24 @@ void Application::onSimulation(RealTime rdt, SimTime sdt, SimTime idt) {
 	if(_dataModel->isRunning())
 	{
 		// XplicitNgine Start
+		std::vector<PartInstance *> toDelete;
 		for(size_t i = 0; i < _dataModel->getWorkspace()->partObjects.size(); i++)
 		{
 			PartInstance* partInstance = _dataModel->getWorkspace()->partObjects[i];
-			_dataModel->getEngine()->createBody(partInstance, sdt*15/_dataModel->getWorkspace()->partObjects.size());
+			if(partInstance->getPosition().y < -20)
+			{
+				toDelete.push_back(partInstance);
+			}
+			else 
+				_dataModel->getEngine()->createBody(partInstance, sdt*15/_dataModel->getWorkspace()->partObjects.size());
+		}
+		while(toDelete.size() > 0)
+		{
+			PartInstance * p = toDelete.back();
+			toDelete.pop_back();
+			p->setParent(NULL);
+			delete p;
 		}
-
 		onLogic();
 		
 	}
diff --git a/src/source/DataModelV2/GroupInstance.cpp b/src/source/DataModelV2/GroupInstance.cpp
index c392f07..45492b9 100644
--- a/src/source/DataModelV2/GroupInstance.cpp
+++ b/src/source/DataModelV2/GroupInstance.cpp
@@ -34,13 +34,11 @@ void GroupInstance::PropUpdate(LPPROPGRIDITEM &pItem)
 
 std::vector<Instance *> GroupInstance::unGroup()
 {
-	std::vector<Instance *> child;
 	while(children.size() > 0)
 	{
-		child.push_back(children[0]);
 		children[0]->setParent(parent);
 	}
-	return child;
+	return std::vector<Instance *>();
 }
 
 void GroupInstance::render(RenderDevice * rd)
diff --git a/src/source/DataModelV2/PartInstance.cpp b/src/source/DataModelV2/PartInstance.cpp
index db45cf6..20b619f 100644
--- a/src/source/DataModelV2/PartInstance.cpp
+++ b/src/source/DataModelV2/PartInstance.cpp
@@ -123,22 +123,22 @@ void PartInstance::setParent(Instance* prnt)
 	{
 		if(WorkspaceInstance* workspace = dynamic_cast<WorkspaceInstance*>(cparent))
 		{
-			std::cout << "Removed from partarray " << std::endl;
 			workspace->partObjects.erase(std::remove(workspace->partObjects.begin(), workspace->partObjects.end(), this), workspace->partObjects.end());
-			break;
 		}
 		cparent = cparent->getParent();
 	}
 	Instance::setParent(prnt);
-	while(parent != NULL)
+	cparent = getParent();
+	while(cparent != NULL)
 	{
-		if(WorkspaceInstance* workspace = dynamic_cast<WorkspaceInstance*>(parent))
+		if(WorkspaceInstance* workspace = dynamic_cast<WorkspaceInstance*>(cparent))
 		{
 			workspace->partObjects.push_back(this);
 			break;
 		}
-		parent = parent->getParent();
+		cparent = cparent->getParent();
 	}
+		
 }
 
 PartInstance::PartInstance(const PartInstance &oinst)
diff --git a/src/source/Listener/GUDButtonListener.cpp b/src/source/Listener/GUDButtonListener.cpp
index 4e00f43..0195b0d 100644
--- a/src/source/Listener/GUDButtonListener.cpp
+++ b/src/source/Listener/GUDButtonListener.cpp
@@ -39,6 +39,7 @@ void GUDButtonListener::onButton1MouseClick(BaseButtonInstance* button)
 		else if(button->name == "Group")
 		{
 			GroupInstance * inst = new GroupInstance();
+			inst->setParent(g_dataModel->getWorkspace());
 			for(size_t i = 0; i < g_selectedInstances.size(); i++)
 			{
 				if(g_selectedInstances.at(i)->canDelete)
@@ -52,7 +53,6 @@ void GUDButtonListener::onButton1MouseClick(BaseButtonInstance* button)
 				/*tempinst->setPosition(Vector3(tempPos.x, tempPos.y + tempSize.y, tempPos.z));
 				g_usableApp->cameraController.centerCamera(g_selectedInstances.at(0));*/
 			}
-			inst->setParent(g_dataModel->getWorkspace());
 			g_selectedInstances.clear();
 			g_selectedInstances.push_back(inst);
 			if(g_selectedInstances.size() > 0)