A woman is at home washing dishes, she looks out the window and sees a huge gorilla in a tree in her yard. She runs to the phone to call her best friend, she asks the friend what she should do. The friend says "call a gorilla exterminator." She thinks thats sounds ludicrous, but decides to see if such a thing exists. In the Yellow pages under 'G' she finds an ad... so she calls. An hour later an old beat up van pulls up to her house and an old man gets out. He's got a dog on a heavy leash and a shotgun. After the home owner comes out, he asks the woman "can you shoot a gun? My assistant called in sick today, so I need a little help." The woman says "sure, I've fired shotguns." So the old man says lets go see the problem.
They walk to the back yard, the old man gazes up and says "he's a big one... OK, here is the plan. I am going to climb half way up the tree and shake the tree vigorously, the gorilla will fall to the ground, where the dog will disable him by clamping his jaws onto his genitals. Then I will tranquilize it and get it loaded into my van. Problem solved." The woman says "that sounds like a foolproof plan, what's the shotgun for?" The old man pauses for a moment and then replies "sometimes I run into a smart gorilla. If he shakes me out of the tree- shoot the dog!"