Peeves was bobbing overhead, now grinning wickedly, surveying the scene; Peeves always loved chaos. As the teachers bent over Justin and Nearly Headless Nick, examining them, Peeves broke into song: “Oh, Potter, you rotter, oh, what have you done, You’re killing off students, you think it’s good fun —” “That’s enough, Peeves!” barked Professor McGonagall, and Peeves zoomed away backward, with his tongue out at Harry.