Murphy is walking down the dirt road dragging two plastic garbage bags with him, one in each hand. There's a hole in one of the bags, and every once in a while a $20 bill is flying out of it onto the beach. Noticing this, a Park Ranger stops him..."Sir, there are $20 bills falling out of that bag..." "Damn!" says Murphy..."I'd better go back and see if I can still find some. Thanks for the warning!" Well, now, not so fast," says the Ranger. "How did you get all that money? Did you steal it?" "Oh, no", says Murphy. "You see, my camper backs up to the bushes and each time some kook comes and pees in the bushes it gets all over my camper! "So, I go and stand behind the bushes with a big hedge clipper, and each time someone sticks his little thingie through the bushes, I say: $20 or off it comes!" "Hey, not a bad idea!" laughs the Ranger. "OK, good luck! By the way, what's in the other bag?" "Well," says Murphy, "not all of them pay."