At a recent Uproar concert, a shirtless male fan ran up onstage while the band was performing "Awake" . . . ran around for a little bit . . . and then put a hat on singer Sully Erna's head. That's when security closed in on the guy . . . tackled him . . . and apparently started to carry him out. Whatever they were doing, Sully thought it was over the top . . . so he stopped the song to scold the security team. Keep in mind the video is UNCENSORED!