"Knock, knock."
"Who's there?"
"Aarghraawa."
"Knock, knock."
"Who's there?"
"Aarghraawa."
Why did Sarah fall off the swing? She had no arms.
What did Sarah get for Christmas? I dunno, she hasn't opened it yet.
Knock knock...
Who's there?
Not Sarah.
"Knock, knock." "Who's there?" "Not Stephen Hawking."
Knock, knock. Who's there? You're adopted.
Why did Sally fall off the swings?
She had no arms.
Knock, knock.
Who's there?
Not Sally.