"Oh, you killed me. What's the trouble with such a big classroom space? " B "I'm willing to make trouble. If you have the ability, you can walk around." "Hey, hey, how can I talk? The classroom is a place to impart knowledge to us, not a playground. If you run around and jump around like this, it's easy to bump into people. B "It's not just hitting you. With so many words. A didn't say much. Think about it. Of all the students, you accidentally hit that one, which not only delayed your studies, but also entered the infirmary. It's really worthwhile. B "OK, I see. You are all good students, so I will not make trouble in the future. Sorry, I won't delay your study and bother you. A and b are roles. Design your own movements or something. You can use humorous words in different places. Let me help you think it over. I hope it can be adopted. Thank you.