A Concussion.
What did E.T.'s mother say to him when he got home WHERE ON EARTH HAVE YOU BEEN Saddest joke ever.
A bit late, but.... A blonde who heard a joke on Friday.
He forgot the safe word.
When God forgets to pay the electricity bill.
Independence Day
They all have telephones...
A: So they don't get a concussion while bobbing their from head side to side as they are saying "I don't know " whenever you ask them a question.