Even if you’ve never heard of Chicago-based indie rockers OK Go, the foursome have staged one of the coolest music videos in memory. "Here It Goes Again" shows the guys in a one-take, intricately staged dance routine aboard eight treadmills. In a triumph of low-budget, fun concept, they jump forward and backward, faux figure skate, and kick out aerobic and dance floor moves. Since the video was posted in You Tube on Tuesday, it’s had more than 1.2 million hits.