A Concussion.
You have no life
Milk. It's pasteurized before you see it.
I forget
To stop themselves sinking into the sand. Why did the ostrich stick its head in the sand To look at the camels who forgot to put their sandals on.
Fresh prints.
Because they all own 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.