Sometimes you just HAVE TO
99.9% of the jobs I've ever quit, I've been very professional about giving a proper two weeks (at least) notice. However, one job that had run me over the coals with their scheduling tactics I very happily went in one day and spoke with the manager, telling him, "I came in to give my notice. You'll notice I won't be here anymore." I then turned around and walked out. It was THE MOST fun I've ever had quitting a job.