A little old lady is walking down the street dragging two plastic garbage bags with her, one in each hand. In one bag there's a hole from which $20 bills occasionally fly out onto the pavement.
Taking note of this situation, a policeman stops her. "Ma'am, there are $20 bills falling out of that bag."
"Damn!," says the little old lady. "I'd better go back and see if I can still find some of them. Thanks for the warning!"
"Well, now," says the cop, "not so fast. How did you get all that money? Did you steal it?"
"Oh, no," says the little old lady. "You see, my back yard backs up onto the Lambeau Field parking lot. Every time there's a game, a lot of fans come and pee in the bushes, right into my flower beds! So, at game time, I go and stand behind the bushes with my big old hedge clippers. And each time someone sticks his little thingy through the bushes, I say: $20 or off it comes!"
"Hey, not a bad idea!" laughs the cop. "OK, OK! You're all right. Good luck!
By the way, what's in the other bag?"
"Well, officer," says the little old lady, "some guys think I'm bluffing."