I came close to it a few summers back, when I gave two weeks notice and two (INCREDIBLY immature) bosses of mine lashed out by giving me really **** shifts, and I had to take a re-certification class like the day before my final shift. I tried getting out of it, but you could only do so at the beginning of each month, and I was unable to. I seriously contemplated telling them to **** off, but decided it wasn't worth addressing in the future when asked why I got laid off. Probably one of the crappiest jobs I ever had, and also the most money I made ironically enough.