Lord Farquaad: All right, then, who's hiding them?!
Gingy: Okay, I'll tell you. Do you know the muffin man?
Lord Farquaad: The muffin man?
Gingy: The muffin man.
Lord Farquaad: Yes, i know the muffin man. W-Who lives down Drury Lane?
Gingy: Well, she's married to the muffin man...
Lord Farquaad: The muffin man?
Gingy: The muffin man!

http://www.youtube.com/watch?v=ixyzSkqrKqM

Prince Charming: You. You can't lie. So tell me, puppet. Where is Shrek?
Pinocchio: Uh, hmm, well, uh, i don't know where he's not.
Prince Charming: You're telling me you don't know where Shrek is?
Pinocchio: It wouldn't be inaccurate to assume that I couldn't exactly not say say that it is or isn't almost partially correct.
Prince Charming: So you do know where he is?
Pinocchio: Oh, on the contrary, I'm possibly more or less not definitely rejecting the idea that in no way with any amount of uncertainty that i undeniably...
Prince Charming: Stop it!
Pinocchio:...do or do not know where he shouldn't probably be, if that indeed wasn't where he isn't. Even if he wasn't where i knew he was, that'd mean I'd really have to know where he wasn't. - Shrek 3