OK Go (those guys from the treadmill video) employed a bunch of engineers from NASA's Jet Propulsion Laboratory to create this delightfully complicated Rube Goldberg machine music video. It's a must-watch.

According to NASA Wiki, "More than 40 engineers, techies, artists, and circus types spent several months designing, building, rebuilding, and re-setting a machine that took up two floors of a Los Angeles warehouse."

The song is titled "This Too Shall Pass," and even though it's been out for a little bit, we think it's worth noting one more time.