This guy wakes up one morning to find a gorilla in his tree. He looks in the phone book for a gorilla removal service until he finds one. "Is it a boy or girl Gorilla?" the service guy asks. "Boy", is the mans' response. "Oh yeah, I can do it. I'll be right there". An hour later the service guy shows up with a stick, Chihuahua, shotgun and a pair of hand cuffs. He then gives the man some instructions. "Now, I'm going to climb this tree and poke the gorilla with the stick until he falls. When he does, the trained Chihuahua will go to bite the gorilla in his, uh, nether regions. The gorilla will then cross his hands to protect himself, and when he does, you to put the handcuffs on". The man asks "What do I do with the shotgun?" "Hopefully nothing, but there's always the chance that the gorilla will grab the stick and throw me out of the tree first. If that happens, shoot the dog"
That reminds me of this one: What's brown and green, fuzzy, has four legs, and if it fell out of a tree onto you, it'd kill you? A pool table!