Related:

• Knock knock Who's there? Don Juan Don Juan who? I Don Juan to set the world on fire!
• (knock, knock) "Who's there?" "A polish thief.
• Knock, knock. Who's there? Gladys. Gladys who? Gladys Thanksgiving. Aren't you?
• Knock, knock. Who's there? Death. Death wh..........
• Knock knock Who's there? Little old lady Little old lady who?
  Gee, I didn't know you knew how to yodel....
• Knock, knock! Who's there? Bella! Bella who? Bella no ringa, so I knocka!
• Knock knock. who's there? honeydew. Honeydew who? Honeydew you love me? now we cantalope.
• Knock, Knock S. Hussein: "Who's there?" KA S.
  H. "Ka who? " KA_BOOM!!!!!...
• Knock, knock." "Who's there?" "Oz." "Oz, who?" "Oz be the new mayor!