This is almost as bad as my mate insisting that pool balls come of the cushions faster than when they hit them... took me ages to convince him that thats not possible and that if it was if you put two cushions close enough a ball would never stop... you cant make energy out of nothing.
constant enertia so if you wanged the pool ball really hard around the table it would just keep going and get faster and faster and faster and faster .....
maybe you should have told him about newtons law .. every action has an equal and oposite reaction .... im still baffled as to how they can be selling these surely its false advertising ???