I often see these types of pictures/videos pop up on social media. These are indeed some truly amazing, passionate and inspiring teachers. I wonder how many of us have already met such teachers during their curriculum. I've only ever met a very select few. Actually, on the top of my head, I can only think of one such person. He would use monster and canon analogies while jumping around in the class to explain Runge-Kutta methods in numerical analysis. I don't remember the technical details of his class, but I do remember the impression he left on us. How about you? As a teacher of physics myself, on occasion, I know how hard and time-consuming it is to prepare classes that inspire.