"Gorilla Capture" joke

As he was quietly watching television at home, a chap hears a sound on the roof of his house and rushes out to investigate. Seeing it was a fair sized gorilla tearing the shingles off his home he promptly calls up the local zoo authorities to inform them one of their animals had escaped. He is reassured that a gorilla recovery unit is on the way and is told to remain calm.
A few minutes later, an old beat up truck, displaying the Gorilla recovery unit logo on its panels, pulls up to the house. The elderly driver proceed to recover from the back of the truck, a chihuaha dog, a pair of handcuffs, a ladder, a baseball bat and a 12 gauge shotgun.
Puzzled on how this lone elderly was to solve the problem of this gorilla who had by now torn half the roof apart, the chap ask him how he will go about doing this.
As he hands him over the .12 gauge shotgun, the zoo employee explains the plan:
- First I'll climb up there with the ladder;
- Then I approach the gorilla and knock him off the roof using the baseball bat;
- As soon as the gorilla hits the ground, the specially trained chihuaha dog will attack its private parts;
- When I get back on the ground, the gorilla will have lowered it's hands to it's groin area to protect itself thus making it easy for me to slip on the handcuffs;
- Then, I lead him to the truck, lock him up and take him back to the zoo...
Amazed at the procedure, the somewhat startled house owner, 'asks why he was handed the 12 gauge shotgun?
"Well... " explains the experienced gorilla retriever, It's just a precaution should thing not go exactly as planned. In the unlikely event that once on the roof the gorilla knocks me off with the baseball bat,
Shoot the dog...