If you've ever been to an idol (virtual or real!) concert, you are familiar with Japanese nerd dancing. It's called "otagei" (オタ芸) or "wotagei" (ヲタ芸), which is short for "otaku" (geek) and "gei" (芸), which can mean "performance" in Japanese. In short, it's a bunch of geeks dancing!
Above, you can see some truly impressive geek dancing. If you are interested in picking up some moves of your own, head over to Otagei.com.