Remember the old Mouse Trap board game? It had nothing on these guys. Check out this video of Rube Goldberg machines (“A Rube Goldberg machine or device is any exceedingly complex apparatus that performs a very simple task in a very indirect and convoluted way. – Wikipedia):
http://video.google.com/videoplay?docid=6176491654107670145&q=rube%20goldberg&pl=true

PS: the music will drive you mad, but it is worth it.