Knock Knock Who's there? Almond! Almond who? Almond the side of the law! 1670. Knock Knock Who's there? Andrew! Andrew who? Andrew a picture! 1671. Knock Knock Who's there? Andy! Andy who? Andy mosquito bit me again! 1672. Knock Knock Who's there? Astor! Astor who? Astor the ball is over!