Little Old Lady

This is from TZ at Laffaday. It made me laff.

A little old lady is walking down the street, dragging two plastic garbage bags with her, one in each hand. There's a hole in one of the bags, and every once in a while a $20 bill comes flying out of it onto the pavement. Noticing this, 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 gather up some of them. Thanks!""Well, now, not so fast," says the cop. "Where did you get that money? Did you steal it?""Oh, no," says the little old lady. "You see, my yard backs up to the parking lot of the football stadium. Each time there's a game, a lot of fans come and pee in the bushes, right into my flower beds! So, I stand behind the bushes with a big hedge clipper and each time some guy sticks his dick through the bushes, I say; '$20 or off it comes!'""Hey not a bad idea!" laughs the cop. "Ok, good luck! By the way, what's in the other bag?""Well," says the little old lady, "not all of them pay up."