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.

Time is a drug. Too much of it kills you.

Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH,' the paint wouldn't even have time to dry.

Whut's the plan, Rob?" said one of them. "Okay, lads, this is what we'll do. As soon as we see somethin', we'll attack it. Right?" This caused a cheer. "Ach, 'tis a good plan," said Daft Wullie.

Contrary to popular belief and hope, people don't usually come running when they hear a scream. That's not how humans work. Humans look at other humans and say, 'Did you hear a scream?' because the first scream might have been you screaming inside your head, or a horse backfiring.

You never knew about people, like you never knew how deep a pond was because all you saw was the top.

Up until now I'd always though RSI meant 'I hate my damn job'.