Good scam

[SLASH]

Buy a lollipop or something for like 36 cents and give the cashier a $20 bill and collect the change. Then say "Oh, I have exact change, hold on", and dig in your pocket and take out the 36 cents meanwhile putting the collected change in your wallet. Upon giving the exact change, the casier will give you your 20 back and magically forget that you already took the 19.64 that he gave you. Works every time.

Hey, Sleeper, I liked the scam better when Harry Anderson from Night Court did it in his book Games You Can't Lose: A Guide for Suckers