The Grim Adventures of Billy and Mandy Quote
Billy: Ask me a question. Give me a challenge. Anything at all.
Grim: Who developed the theory of relativity?
Billy: That is a trick question, Grim. Everyone knows fruit bats are mammals.
Grim: Who developed the theory of relativity?
Billy: That is a trick question, Grim. Everyone knows fruit bats are mammals.
TV Show: The Grim Adventures of Billy and Mandy