The Japanese TV show Pythagora Switch uses adorable little videos of complex Rube Goldberg machines as idents/interstitials. Someone's collected a zillion of them and youtubed 'em.
(Thanks, 5000!)
See also:
Ultimate rube goldberg machine
Rube Goldberg style contraption video
Rube Goldberg: 125-step flashlight battery changer
Rube Goldberg machine built out of sticks and stones
Mesmerizing Rube-Goldberg Honda ad
Rube Goldberg machine to be demoed tomorrow in NYC