Well, during my first week in high school I noticed one older student who would take any chance he had to shove smaller students into lockers. I waited and set myself up at an empty locker a few days later.

He tried to shove me in and I reversed him into it. I then use a quick set metal epoxy to seal him in. The shop teacher had to bring up a cutting torch to remove the door.

I spent a month in after school detention, but that bully NEVER treid anything again!