What is the most naughty child you have ever seen?

Who hasn't been naughty at school or as a child? Let's talk about the most naughty child I have ever seen. That was when I was in primary school. It should be in math class that the teacher wrote it on the blackboard with a brush. When chalk writes on the blackboard, it squeaks. If a student walks back and forth on the desk with a cylindrical pen, it will also make a squeaking sound. It can be said that I stopped the teacher because of his sense of rhythm, so the teacher found out who had such a strong sense of rhythm and kept pace with the teacher.

The teacher found out and didn't say anything, so he turned to hit the student on the head and said how I saw a beam of white light and jumped on your head. The student stood up without saying anything, and then sat down again.