What interesting things happened between you and your former deskmate?

In physics class, the teacher asked me questions, and I stood up and stopped answering. She secretly blocked herself with a book and told me. Then the teacher asked me to sit down and let her stand up and answer questions, standing next to us. No one dared to say anything at that time. Then she ended up standing there for a class. Although I knew it was not authentic at that time, I couldn't help laughing after the teacher left. Her teeth itch with anger, and then I secretly handed her the snacks in the hole in the table.