Recalling that when he was in elementary school, his teacher arranged for him to sit at the same table with her, but he refused and even quarreled with the teacher in class. Finally, the teacher asked him to face the wall and think about his mistakes, and then said to everyone: "If any classmate can use an idiom to explain his current behavior, then he can return to his seat and listen to the class."
"Humph" was a very small voice, but it was still heard by her. She knew it originally, but in order to convince him of his so-called attitude, she turned around and rolled her eyes at him, and then replied to the teacher: "Teacher, I know what the idiom is." "Oh, tell me what idiom it is." She turned around and saw him staring at her in surprise. She responded to him with a smile and said to the teacher: "Teacher, I don't know if this idiom is called self-inflicted trouble. It is often said on TV that it is self-inflicted, so isn't this called self-inflicted trouble? "As soon as he finished speaking, he looked at the teacher with innocent eyes, while the classmates were all laughing. He knew that she was not going to be kind, and it turned out that she wanted to make a fool of herself. After this incident, the feud between the two ended like this.