@Override
    protected void removePhysics(PhysicsSpace space) {
        space.removeCollisionObject(rigidBody);
        space.removeTickListener(this);
    }
Remove all managed physics objects from the specified space.

@param space which physics space to remove from (not null)
jme3-jbullet/src/main/java/com/jme3/bullet/control/BetterCharacterControl.java