We're dealing here," said Vimes, "With a twisted mind." "Oh, no! You think so?" "Yes." "But... no... you can't be right. Because Nobby was with us all the time." "Not Nobby," said Vimes testily. "Whatever he might do to a dragon, I doubt if he'd make it explode. There's stranger people in this world than Corporal Nobbs, my lad." Carrot's expression slid into a rictus of intrigued horror. "Gosh," he said.