Knock Knock Walter White: knock knock. Skyler : knock knock who? Walter White: I am the one who knocks.

Why can't you tell Walter White a knock knock joke? Because he is the one who knocks.

What does Walter White say when he tells a knock-knock joke? I am the one who Knock-knocks.

Knock Knock! **Knock Knock** Who's there? **Britney Spears** Britney Spears who? **Knock Knock** Who's there? **Oops I did it again!**