I walked in, threw my uniforms on the counter and said “Hi Angie, I quit”. That was when I worked at Wendy’s when I was 18.
Before that I worked for a Hawaiian BBQ place that’s cockroach policy was “don’t let them get up front where the customer’s can see”. I had asked if I could have the night off because I had made a promise to go see my brother’s band play their first show (a commitment I made month’s in advance without any knowledge of when it might be). The boss was ok with it only if I found someone to cover my shift, which I did. When I went to let the boss know John would be covering my shift he said “anyone but John”. I thought that was unreasonable and the job sucked anyways (I hate cockroaches), so I quit and asked John out to the show. When I picked John up that night at the end of his shift he told me the boss had tried to get him to cover my shift after I quit.
Oh and then there was the telesurvey job I had. The phone dialer system went on the fritz one day and while everyone had to sit around and do nothing for 20 or 30 minutes I did the math and figured out that with the cost of gas at the time, how far I had to drive, the limited hours I was working, and how little they were paying it wasn’t really worth while to continue working there (it was when I started but when I started I lived just down the street and was brought in by a temp agency that was paying me $3 an hour more). When I explained it all to my supervisor she was really understanding and had this look in her eyes like she needed a calculator. She had a serious meth addiction likely fueled by the fact that while bottom level employees only worked 4 to 6 hours a day supervisors and managers often had to pull double shifts 6 days a week.
The last fast food place I worked at my GM, when I asked for the paper work to put in my two weeks notice, told me no. He said he wouldn’t give me the paperwork until after he stopped crying. I kinda miss him. He did eventually give me the paperwork though.