An elderly lady walks up to me and says she forgot to use a coupon. I ask her for her receipt and the coupon. She hands them both to me, but the barcode for the coupon is missing. So I ask her where the other piece is. She looks at me dumbfounded and says "There's supposed to be a barcode?" I show her the part of the coupon where the rest of it used to be. To which she replies "That was dumb of me. I didn't know you need that part." So I apply the coupon anyway before it turns into her not going away until something is done. So I hand her back her receipts and the dollar. As she puts the receipts away she asks "Are you going to give me a dollar?" I says "I did, it's in your hand."