Knock knock! Who's there? Yah! Yah who? Naaah, bro, I prefer google.
Knock, knock Who's there? I'm Mr, Farter. Mr, Farter who? I've brought some insecticides to give to your mother in law!
Knock, knock. Who's there? Owls say. Owls say who? Yep, that they do.
Knock knock. Who's there? Hatch. Hatch who? Bless you.
Knock Knock! Who's there? Justin Justin who? Justin time for dinner!
Knock Knock. Who's there! Ice cream! Ice cream who? Ice cream if you don't let me in!
Knock Knock. Who's there? Opportunity. Don't be silly - opportunity doesn't knock twice!
Knock Knock! Who's There? Figs Figs who? Figs the doorbell, it's broken!
Knock, knock. Who's there? Kanga. Kanga who? Actually, it's kangaroo!
Knock, knock. Who's there? Nobel. Nobel who? No bell, I knock.