A little old lady was walking down the street dragging two plastic garbage bags. One bag had a hole in it and $20 bills were flying out of it.
A policeman stopped her and said, "Ma'am, you're losing a lot of bills from that bag."
"Darnd!" she said, "Thanks for the warning. I'll go back and pick them up."
"Hold on there! Where'd all that money come from? Did you steal it?"
"Oh, no," she said. "My yard backs up on the stadium parking lot and, during tailgate parties, a lot of guys use my flower beds as bathrooms. So I stand behind a bush with my electric hedge clipper and when one is in mid-stream, I fire up the trimmer and say: '$20 or off it comes!'"
"Wow. Good idea!" laughed the cop. "But what's in the other bag?"
"Well," said the little old lady, "not all of them pay up!"