"THE SIGN! ON THE BACK OF THE CAR! SAID CRITTERS! OF HOLLYWOOD! YOU DUMB FUCK!!"
Also a Crowning Deleted Scene of Funny: "Jay's Dream Date."
Jay and Silent Bob running through the Hollywood back lot trying to escape some guards. They turn and run down one street and WHAM! Crash and fall over thanks to a background piece painted exactly like the real street behind it.
Gordon: Echo Base, I've got a 10-07: two unauthorized on the lot, requesting backup. Echo Base: [over Gordon's walkie talkie] I thought that was a 10-82. Gordon: No sir, a 10-82 is disappearing a dead hooker from Ben Affleck's trailer. Echo Base: [slightly amused] Oh, that Affleck! Backup on the way...
Crowning Blooper Of Funny - when Matt Damon and Ben Affleck are pretending to film Good Will Hunting 2, they repeat a certain 'take' several times because they are corpsing, culminating in them laughing too hard to speak at all. Ben Affleck's high-pitched laugh has to be heard to be believed.