The moment i read ur question what pops in my head is the the life am experiencing in school.I will share u about my chemistry teacher who is really a good teacher and a really frightening teacher.Every students get afraid to him and he share he is really disheartened by the behaviour of students to him.And he use to joke in class sometimes but most of the time he teaches in a serious manner. And in his period even the sleep ran away,everyone is really alert and active compared to 9ther subject.And he share one of the story that is really funny about himself. He told that when he was teaching in the class 10 room ,he farted unintentionally and he knew he had fart but he continued with the teaching as if nothing had happen.And student arw staying as if they didn't heard because they feel if they laugh they will get a nice beating from him so no one laughe. But the moment the sir left everyone laughs a lot and he said he was blush!!!!!?