Got this straight from /., I'm sure many of you will enjoy.

<<<<<<<<<
I already have the patent on several "free" energy sources, but they aren't strictly free. There's the Feline Buttered Bread Commutator for example. It operates by strapping a piece of buttered bread buttered face up to a cat's back, then dropping it from a height. Since a cat always lands on its feet and buttered bread always lands butter side down, the whole apparatus simply hovers and spins in midair. By adding a wire coil to the cat and by putting a strong magnet in close proximity, voila! Free energy. Of course, it's not that there isn't any loss. For example, the cat needs to be fed and the bread gets stale. The cat tends to vomit occasionally, so there is some clean up involved.
>>>>>>>>>

References:
http://slashdot.org/comments.pl?thre...nge&sid=194637
author ElboRuum (946542)