Octogenarian John Hetlinger made headlines last month when he delivered a surprisingly intense performance of Drowning Pool’s “Bodies” on America’s Got Talent. The retired aerospace engineer and former Navy pilot evidently impressed the band themselves too, because they invited him to join them onstage during their performance at Chicago’s Open Air Music Festival yesterday. He did, and he sang “Bodies,” and it was glorious. His parting words as he exited the stage after the performance? “Let the bodies hit the floor.” Watch below.