I was taking a class in business law at the time and was sure I had a case.
I had received top reviews from all my students and all of them received higher grades because of my excessive wisdom, humility, and tutorship. They told me I was fired for not being a good tutor, but the grades and reviews I had said otherwise.
I had blown out my knee at the time and the crutches made it very hard for me to participate in orgs' social aspect and because it was so cliqueish I was just not part of the inner circle. Even with my handicap tag in the car I just couldn't make it to their little non-required parties without exorbitant effort and it just didn't make sense for me to try.
I felt like I was fired because of my injury and had evidence to back it up. Decided it wasn't worth it for such a lousy job and being right just wasn't worth the hassle.