This guy claims that this invention is a perpetual motion machine, the Philosopher's Stone of physics, the Holy Grail of power. Play the video and check it out for yourself.

The machine uses neodymium magnets and some simple mechanics to achieve its feat. It actually moves on its own for quite a while. How long it actually does so, we don't know. Of course, it is not going to be perpetual. Even if there was no friction — and inevitable energy loss — the magnets will lose their magnetism after a few years, plus there's air resistance, and a load of other energy sapping annoyances.

But even while the machine will stop because physics is just that stubborn, it's cool to watch. Magnets are always cool, and all the demos that lead to the machine are neat. [Thanks Oscar!]