In college, we had this prof for physics who liked to pick on a few students, basically me and a few others. We had an exam, and he would take off major points over trivial items. Cases were people were getting the correct answers but he didn’t agree with our work, s@#t like that. And we’re talking getting 2/20 on a question, which pretty much f@#ks you over.
After insulting us the prof gets up and solves a problem on the board, and made a trivial mistake, the kind of one that nearly caused us all to fail his class. One of the guys gets up, writes “F” on the board, flicks him off and walks off. Truly the hero we need.