Pretty much the entire film, really. There's so much random nonsense, silly punning and sheer bizzareness that it borders on Rapid-Fire Comedy.
Ringo: I could have sworn it was a yellow submarine. But that isn't logical now, is it? It must have been one of those "unidentified flying cupcakes"...or figment of my imagination. <beat> But I don't have an imagination.
The defeated Chief and Max:
Chief: It's no longer a blue world, Max. Where could we go?
Anything with the Chief Meanie is a trifecta of horror, Funny Moments, and Crazy Awesome, especially if you can't understand what's he's saying.
"You're advancing the wrong way! Retreat backwards!"