The Riddler stuff with the outrageously far-fetched clues was always a highlight for me.
From the movie:
[quote]Batman: One: "What has yellow skin and writes?"
Robin: A ballpoint banana.
Batman: Right! Two: "What people are always in a hurry?"
Robin: Rushing people? Russians!
Batman: Right again! Now, what would you say they mean?
Robin: Banana… Russian… I’ve got it! Someone Russian is gonna slip on a banana peel and break their neck!
Batman: Precisely, Robin! The only possible meaning![/quote]
The way West responds with “the only possible meaning!” at the end is just brilliant.