A man walks into a gun shop to buy a sight for his rifle. He asks the shop keeper "whats the best sight you've got ?"
The shopkeeper replies " Here it is the SuperSight 9000"
He adds "You can see right up to my house all the way on the top of the hill"
The man says " Ah so you can and sorry to tell you but your wife is being chased by a naked man in your house"
The shopowner locks the sight onto a rifle and says " Shoot her head off and his dick off in two shots and i'll give you this gun, sight and $3000"
To which with much chuckling the man replies "what if I can do it in one ?"