Once upon a time, there was a class, not better or worse than any other, where a new physics teacher arrived. When she entered the classroom, we spotted a tall, straight, gritty woman with long hair, glasses and rigorous eyes. One day, she called a student to answer her questions and the student couldn’t recall the right answer. The teacher was infuriated and gave voice to her dissatisfaction: “I can’t believe that here we go again, next time I should rather lecture the wall because it understands better what is said” – that was the kind of comments we heard at her lessons. At the school corridor, we talked about our bad feelings that these comments evoked in the class, and, by chance, the teacher overheard our discussion. In that very moment, something gave us the creep, we just felt her presence. Next moment, we found ourselves sitting at a homeroom with our headmaster and the physics teacher. She asked us about what happened at the corridor and she was interes...