Well check this out: http://youtube.com/watch?v=iFJAhvplGf8&mode=related&search=
I don’t really like the music because it descends into chaos near the end, but other than that, I love it!
It’s just a matter of time 'till we see alot more robots up on stage and a lot fewer humans.
P.S. these are cool too 
http://youtube.com/watch?v=847tq4rNsjY
http://youtube.com/watch?v=bSzkgYrj_2o&mode=related&search=
Same deal with the music, but the mechanism is still cool.