I once had a family of 4 come in, a wife, husband and 2 kids, the wife ordered a cheese burger. Everything seemed to be going well, I asked if they like their food and if there was anything I could get for them, they said everything was fine. The wife finished her burger and got my manager, she told her that he burger was absolutely horrible and wanted a refund for the whole meal. My manager almost laughed at her and told her if she hadn’t finished the burger and had said something at the beginning she would have gladly gotten her another burger but there was no way she was getting a meal for 4 for free nor was she getting hers for free because she, at first, told me she liked it. Best Manager ever!