Knock Knock Who's there? Alec! Alec who? Alec-tricity. Isn't that a shock! Knock Knock Who's there? Alec! Alec who? Alec my lolly! Knock Knock Who's there? Alex! Alex who? Alex the questions round here! 1650. Knock Knock Who's there? Adair! Adair who? Adair once but I'm bald now! Knock Knock Who's there? Adlai! Adlai who? Adlai a bet on that!

*knock knock* whos there? sir theres been an accident. theres been an accident who?

"Knock knock." "Who's there?" "Doorbell repairman."

Knock knock?? Who's there?? Jehovah Witness. Knock knock?? Knock knock?? Hello?? Knock knock??