A little old lady is walking down the street, dragging two plastic garbage bags, one in each hand. There's a hole in one of the bags, and once in a while a $20 bill flies 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…