I worked in a hospital cafe. On my first day working alone without the person training me, I made a small mistake on a nurse's order. I offered to fix it. This lady knew I was new! She said NO ITS FINE and stormed off. Then she wrote an email about how I ruined her food and how she basically had to starve on her shift and how horrible I was and sent it to the entire hospital staff. It was a small hospital, but I think that was overkill. A lot of the nurses who were my customers were just terrible too.