Knock Knock 9/11

This is a dark and morbid play on words using the 9/11 attacks. The setup is the classic "knock-knock" format, but instead of a name the response is "9/11", which is not a name but the date of the terror attacks. The punchline uses the common phrase "never forget" which is associated with that event.

• 9/11
• Knock knock
• Morbidity
• Date
• History
• Memory

• Knock, knock. Who's there? I don't know, but the Twin Towers do.
• Knock, knock. Who's there? Your dad. But my dad's dead. I know, just reminding you!
• A policeman once said, "I will never forget 9/11." I said, "I hope not, that’s your phone number!"
• "Knock, knock.""Who's there?""Kid.""Kid who?""Kidnap you!"