A man wakes up one morning to find a gorilla on his roof.
So he looks in Yellow Pages and sure enough, there's an ad for a firm of gorilla removers.
He calls the number and the gorilla remover says he'll be over in ten minutes.
True to his word, he arrives a while later, with a ladder, a baseball bat, a shotgun and a pit bull.
"What are you going to do?" the man asks.
"I'm going to put this ladder up against the roof," replies the gorilla remover.
"Then I'm going to go up there and knock the gorilla off the roof with this baseball bat.
When the gorilla falls off, the pit bull’s trained to grab his testicles and not let go. We can then put the gorilla in the truck."
So the guy puts up the ladder. Then he hands the shotgun to the home owner.
"What's that for?" he asks.
"Well," says the gorilla remover, "if the gorilla knocks me off the roof, shoot the dog!"