I was at McDonalds or Burger King once, pulled out a fifty to pay and held it out thinking the guy was going to grab it, but he was talking on his headset and not really paying attention. He stepped away to get the drinks or the food, I remembered I had a 20 in my pocket. I pulled out the 20 and paid my bill, he handed me the change and my food. As I was driving away, I realized he had given me change for a 50 even though I paid with a 20. I was thinking about going back to straighten it out, but then I remembered all the times they fucked up my order over the years and said "fuck it"