In The Breakfast Club, John Bender is crawling through the ceiling space back to the library after being locked in the closet. He is reciting a joke to himself.
It goes:
Naked blonde walks into a bar with a poodle under one arm and a two-foot salami under the other. She lays the poodle on the table. The bartender says, “I suppose you won’t be needing a drink.” Naked lady says…
Then he falls through the ceiling. Any ideas of what the punchline ought to be?