A guy surprises his brother by slapping him in the face with some flour.

OK Go Treadmill video: This is the music video that supercharged OK Go's career and helped solidify our new viral video culture. When OK Go posted this video online, it caused an instant sensation and everyone you know began sending the video to everyone else you know. The video is for OK Go's "Here It Goes Again" and this is #4 on the list of top 50 YouTube videos from Time Magazine.