Knock Knock!
Who's there?
Kanga.
Kanga who?
No! Kanga roo!
Knock Knock!
Who's there?
Hand.
Hand who?
hand over your wallet, this is a stick up!
Knock Knock!
Who's there?
Zippy.
Zippy Who?
Zippy dee-doo-dah, zippy dee hey!
Knock Knock!
Who's there?
Ezra.
Ezra who?
Ezra no hope for me in this world!