Ever see a teacher get pissed and walk out of cl?

I have twice in my life. Once in junior high in ypsilanti, mi at choir. No one would listen, and kept mocking the teacher. He threw his music sheet on the floor and stormed out. The second time was in college during a statistic cl. This was in nv. The teacher had a thick accent, and was nerdy. Some were bluntly poking fun at him and laughing. He threw his chalk at the board, said something and stormed out. He was pissed.