This video shows a potential fight within a high school classroom between a couple of hot heads. What does the professor do? He steps between the two would-be pugilists, using his words and actions to diffuse a very common, volatile situation. He isn’t demeaning. He isn’t rude. He isn’t violent. From the sound of it, he’s speaking from experience and know-how. This is the kind of reinforcement we need in school. You want to fight? Fine. Do it here and face the consequences.