Knock knock jokes

Rand loves knock-knock jokes right now. His favorite one is the knock-knock-banana-knock-knock-banana-knock-knock-orange-you-glad-I-didn't-say-banana one. That one at least makes a little bit of sense. He was telling jokes in the car this morning that all went like this:

Knock knock!
Who's there?
Pan!
Pan who?
Pancakes!

Knock knock!
Who's there?
Cat!
Cat who?
Caterpillar!

And so on.

Then Ella tried:

Knock knock!
Who's there?
Banana!
Banana who?
BANANA ORANGE!!!!!

Rand: "Ella, that doesn't even make sense."