A man comes home one day to find a bear stuck up on his roof. Looking in the phone book he's pleasantly surprised to find a bear removal service listed and quickly makes the call.
About 30 minutes later a van pulls up and a man gets out with a ladder, a big stick, a Pit Bull, a large bag and a shotgun. The homeowner greets the man who explains what he will do.
"First," starts the man as he sets up the ladder next to the eave, "I'll climb up on the roof and attempt to knock to bear off the roof. This dog has been trained to latch on to the crotch of the bear which will subdue the bear and I'll come down and put it in the bag."
"OK," says the homeowner a little doubtful of this plan.
"Now here is the most important part," replies the man, handing the shotgun to the homeower, "should the bear knock me off the roof, shoot the dog."