Here's mine. Knock knock. Who's there 911. 911 who You said you'd never forget
9/11
One was planned.
Knock Knock Who's there? 9/11 9/11 Who? I thought you said you would never forget!
Goldfish: I forgot Goldfish 911: Forgot what Goldfish: WHO IS THIS Goldfish 911: I DON'T KNOW
Instead of 'knock knock', they say, 'Arrr you there !'
Jeffrey. Knock knock, Who's there? NOT JEFFREY
I go to the tallest tower in my city. Call up a pizza place and order two large planes.