Knock, knock. Who's there? Kanga. Kanga who? Actually, it's kangaroo!
Knock, knock. Who's there? Nobel. Nobel who? No bell, I knock.
One day a man heard knocking at his door. He opened the door only to see a small snail sitting there smiling. The guy picked the snail up and threw it as far as he possibly could. Three years later he heard knocking at the door again. He opened the door to see the snail. The snail said, "What the hell was that all about?"
Knock Knock Who's there? Muffikin Muffikin who? Muffikin fingers are trapped in the door.
Me: "Will you Remember me in a day?" Her: "Yes." Me: "Will you remember me in a week?" Her: "Yes." Me: "Will you remember me in a month?" Her: "Yes." Me: "Will you remember me in a year?" Her: "Yes." Me: "Ok, I have a joke. Her: "Ok." Me: "Knock, knock." Her: "Who's there?" Me: "You didn't remember me."
"Knock, knock.Who's there?" very long pause... "Java."
Knock, Knock! Who's there? D umbbell. Dumbbell who? Dumbbell doesn't work so I had to knock!
Knock Knock! Who's there? Zany Zany who? Zany body home?
Knock knock. Who's there? Urine. Urine who? Urine trouble if you don't open the door.
Knock-knock. Who's there? To. To who? No, to whom.