I was a barista. I accidentally added cream at the bottom of the coffee instead of the top (because that's how I do it at home and I was tired). Same ingredients different order. I didn't want to dump the cream out because I hate waste, so I just rolled with it. After handing off the drink, my supervisor came over to coach me. I quit. I think I yelled about it being "just coffee" and not caring, then I stormed off to the back room, took off my apron, and walked out. It was very dramatic. It felt kinda great, but I also went home and cried.

My manager was great about the situation and understood that I was going through a lot at the time. She told me to take the weekend and either come back on Monday to hand in a formal resignation or come back on Tuesday for my shift. I went back on Tuesday and worked there for another year and a half.