I once read on the machinist's forum about a low key timid draftsman being berated constantly my some bullying manager. One day after YEARS of this treatment the draftsman got up right after the last abuse session and hit the bully over the head with a heavy gear fracturing his skull. The injured bully was taken away by ambulance, no one questioned anything and charges were not pressed. The bully came back to work and was never the same after.
Mind you this happened in the seventies, might not fly in this day and age.