A Panzerism

 Panzer on jokes:

Panzer: Knock. Knock.

Mom: Hmmm?

Panzer: Knock. Knock.

Mom: Hmmm? What?

Panzer: I say, Knock. Knock. and You say, Who's There?

Mom: Okay. Knock. Knock.

There's a first time for everything. *

Panzer: Who's there?

Mom: It's me, Mom.You've known me your whole life, Panzer.

Panzer: What? Wait! I mean, what? Hey! What happened?

* From Cat Wisdom for humans