“When Mister Safety Catch Is Not On, Mister Crossbow Is Not Your Friend.”
“What did I tell you about Mister Safety Catch?' said Vimes weakly. When Mister Safety Catch Is Not On, Mister Crossbow Is Not Your Friend,' recited Detritus, saluting.”
“When did you suddenly become Mister Maturity?”
“Hohohoho, Mister Finn, you're going to be Mister Finnagain! Comeday morm and, O, you're vine! Sendday's eve and, ah you're vinegar! Hahahaha, Mister Funn, you're going to be fined again!”
“I believe your friends Misters Fred and George Weasley were responsible for trying to send you a toilet seat. No doubt they thought it would amuse you.”
“Mister, we deal in lead.”