I could watch this stuff for ever

A ball rolls down a slope, hits a pen that falls over a small catapult, launching another ball through a hoop wich again makes... you get the point. It wasn't possible to post the long one, but you can watch it here.

Honda made one of these into a commercial which is pretty cool, though there seems to be some moon'ish gravity at work at some points..



This one is really cool. There are some disturbing graphics in the beginning an a very excited Japanese guy talking all the way through, but absolutely enjoyable.