Knock, knock.
Who's there?
Ahhh.
Ahhh who?
Werewolves of London.
Knock Knock.
Who's there?
Dishes.
Dishes who?
Dishes Sean Connery.
The inventor of the "Knock Knock" joke won a prestigious prize...
The "No Bell" prize!
Knock knock...
Knock knock...
Knock knock...
Knock knock...
Knock knock...
Guess nobody's home...