People who were fired on their first day at work/saw somebody get fired their first day at work: What happened that led to the firing?

When I worked at a movie theater, I was showing a new hire how to prepare pretzels. After I sprayed a little mist on them and was dribbling some salt over them, he said something along the lines of, "Man this is too much," took his vest off, and went to find a manager to hand it to.

Tbf when I worked at BK they told me everything I would be doing as a line cook. When I started my shift the first thing the supervisor told me to do was clean the washrooms. I told them no, I was hired as a line cook and no one told me about washrooms. So the supe says I can clean them or he'll get the manager involved and I'll probably be fired. I said sure call him. Supe comes back and tells me to start in the kitchen. Turned out line cooks were not supposed to be cleaning washrooms and the manager came in the next day to explain everyone's duties.

But later turned out that supe was going out with one of the cashiers.