A little old lady was walking down the street dragging two large plastic garbage

bags behind her.  One of the bags was ripped and every once in a while a $20
fell out onto the sidewalk..  Noticing this, a policeman stopped her, and said,
Ma'am, there are $20 bills  falling out of that bag "Oh really?
Darn it!" said the little old lady. "I'd better go back and see if
I can find them. Thanks for telling me officer."  Well, now, not so
fast," said the cop.  Where did you get all that money?  You didn’t steal
it, didn’t you?" "Oh, no, no", said the old lady. "You see, my
back yard is right next to the football stadium parking lot.  On game days, a
lot of fans come and pee through a knothole in the fence, right into my flower
garden. 
It used to really tick me off.  Kills the flowers, you know. Then I thought,
'why not make the best of it?  So, now, on game days, I stand behind the
fence by the knothole, real quiet, with my hedge clippers. Every time some guy
sticks his thing through my fence, I surprise him, grab hold of it and say,
'O.K., buddy!  Give me $20, or off it comes.'    "Well, that seems
only fair," said the cop, laughing. "OK. Good luck! Oh, by the way,
what's in the other bag?"  "Well, you know", said the
little old lady, "not everybody pays."