When I got up to make a coffee this morning, I saw a mouse trap jumping accross the room. It appeared to be violating the law of Inertia [an object will remain at rest or move at a constant speed in a straight line unless it is acted on by an unbalanced force.] There was clearly no human force acting on the mouse trap. One of our cats was also wondering if the mouse trap was violating the law of Inertia.