Knock knock. Who's there? Documentation.

who? This joke is still in beta and the punchline has not been implemented yet. Please try again later.

Knock knock. Who's there? Disguise.

Disguise who? The sky's the limit for wordplay, so prepare for an un-pun-believable groan-fest!

Knock knock. Who's there? The premise.

The premise who? The premise for a knock-knock joke needs two people, and I'm talking to myself.

Knock knock. Who's there? Peas.

Peas who? Peas-fully waiting for you to open the door!