Knock Knock!
Who's there?
Dewey.
Dewey who?
Dewey we have to keep telling these knock knock jokes?
Knock Knock!
Who's there?
Robin.
Robin who?
Robin da bank!
Knock Knock!
Who's there?
Saddam.
Saddam who?
Saddam, and shut up!
Knock Knock!
Who's there?
Iguana.
Iguana who?
Iguana hold your hand.