Have you ever scared a stupid teacher before? I have~

And I have done that many times! Let me teach you how to scare your teacher perfectly.

First, you need to walk quietly so that the teacher won't notice you. I have tried it millions of times and it worked every time! 

Second, you need to act like nothing is happening when someone else is walking quietly toward the teacher. You can't laugh or look at that person. Otherwise, the teacher will think something is strange.

Third, you need to shout in the teacher's ear, like Boo! In this way, the teacher will have a heart attack and you enjoy her scared face.