Interesting Times/Funny

"One by one, as the thought sank in, they [the faculty] grinned at the Archchancellor. Ridcully: Don't look at my cheeks like that! I don't dominate anybody!"
 * While any dialogue concerning the Unseen U's senior faculty can be considered, this one stands out. It starts out with the Dean saying the Librarian isn't a proper orangutan, not having the huge cheek pads a dominant male should. Later on, it is pointed out that while the Librarian is the only orangutan at UU, he's only the librarian, and doesn't dominate the University.

"The Dean: But I hate foreigners! Ridcully: So do they. You'll get along famously."
 * Ridcully's attempt to send The Dean to the Counterweight Continent:

"He touched his nose. They touched their noses. He made, with terrible glee, the traditional gesture for the dismissal of demons. Seven thousand terracotta middle fingers stabbed toward the ceiling."
 * Every staff member claiming to have visited their aunts in distant towns during the events of Sourcery... except Ridcully, who really had been in a distant area at the time.
 * A fact illustrating the unreliability of magic armour: the last words of many of the Disc's ancient lords were "You can't kill me because I've got magic aaargh."
 * Rincewind getting comfortable with the Red Army controls.


 * There are not 2,300,009 invisible bloodsucking vampire ghosts.
 * The wizards kill Hong by teleporting a lit cannon right next to him. Accidentally.
 * And thinking they were doing the Agateans a favor by lighting it first, mistaking it for a harmless firework. Well, they were doing them a favor, just not the one they thought.
 * "'Ere wot a toff! 'Eave arf a brick at 'im!"