A man in a fast-food restaurant drive-thru paid for his order with a $50 bill. He received $42.87 in change. The man drove around the building and pulled into the drive-thru again to order a couple of more hamburgers. Again, he pulled out a $50 bill to pay, but the employee said she didn't have enough change and asked if he had any smaller bills. He said he didn't, and she replied that she had just given him $42.87 in change a few seconds ago.