The Evolution Bazooka

Pastor Bailey doesn’t like evolution being taught in the local public schools, and he’s demanding that creationism be taught alongside it.
The faculty has refused to teach creationism, and the Science Department has put their heads together to prepare a formal response.
“BEHOLD!” shouts the wild-eyed Professor Jankins, brandishing a shiny silver tube. “THE EVOLUTION BAZOOKA!”
I tap my fingers on my desk. “Really, Stan?”
He laughs, points the bazooka at a potted plant, and pulls the trigger.
Nothing happens.
Later that afternoon, he realized the batteries had been put in backwards, and he turned a student into a chimpanzee.