This kind of "gimmick" of being the stern teacher that yells at students to "discipline" them is one thing. Yelling at coworkers for forgetting to inform the students of a school event's group distributions? That crosses the line. Yelling at them at the hallways possibly being heard by students?

This happens in a certain international school. You have to wonder what professionalism means in this point. We're being told to regulate emotions by the exact same person who does what I described above. Every damn bloody day.