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

Hammer:  Now, here is a little peninsula, and, eh, here is a viaduct leading over to the mainland.

Chico: Why a duck?

Hammer: I'm alright, how are you? I say, here is a little peninsula, and here is a viaduct leading over to the mainland.

Chico: Alright, why a duck?

Hammer: (pause) I'm not playing "Ask Me Another," I say that's a viaduct.

Chico: Alright! Why a duck? Why that...why a duck? Why a no chicken?

Hammer: Well, I don't know why a no chicken; I'm a stranger here myself. All I know is that it's a viaduct. You try to cross over there a chicken and you'll find out why a duck.