Beware of those clippers...

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 is 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 still find some. Thanks
for the warning!" "Well, now, not so fast," says the cop. "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 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 go and stand behind the
bushes with a big hedge clipper, and eachtime someone sticks his little
thingie 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"....