Boards
Yes, OK Go are a bit crap. But this video is good
https://jlbriones.wordpress.com/2006/08/02/what-would-you-do-with-8-treadmills/
Passed to me by simmo_is_great, a lurker if ever I saw one
Dunno if this has been posted before, or if indeed it is rather old, but I'd never seen it before and it's worth a watch. Well, just one