private void removeFace(final AnimatedSprite face) {
    final Scene scene = mEngine.getScene();

    final PhysicsConnector facePhysicsConnector =
        mPhysicsWorld.getPhysicsConnectorManager().findPhysicsConnectorByShape(face);

    mPhysicsWorld.unregisterPhysicsConnector(facePhysicsConnector);
    mPhysicsWorld.destroyBody(facePhysicsConnector.getBody());

    scene.unregisterTouchArea(face);
    scene.getLastChild().detachChild(face);
  }