Seconds before Girl Talk's Gregg Gillis entered the stage in his requisite oversized sweat suit, the audience went wild screaming his name and jumping up and down. Mosh pit mayhem ensued—overzealous teens and twenty-somethings thrashing around to a mashup of Radiohead, Michael Jackson, Beyonce, etc. We never prayed so hard for our safety. As usual, Gregg was down to pants-only by the end of his set, getting wild with his onstage posse. Surely the rowdiest act of the day, but we can't say the best. One thing's for sure—next time we're watching from afar.

videos by Jason Jurgens