Last week, we showed you OK Go's new video, "The Writing's On the Wall," the latest in the band's series of impeccably orchestrated one-take videos chock full of optical illusions and visual tricks. Here's the behind-the-scenes look at how they did it. Short answer: it was frantically precise.

Sure, there was plenty of running around going on in front of the camera, but it was dwarfed by the number of people scrambling around behind the hand-held camera's view. But what looks like hurried chaos in this making-of video was really a super-precise collection of perfectly timed moves, as the finished product shows.

Somehow, between all the Rube Goldberg devices and the madcap assistants operating them, it all came off perfectly. And now you can appreciate just the amount of sweating and panting that went into it. [OK Go via Swiss Miss]