How about I think I branded a boy at my school and enjoyed every second of it.
That's so wrong. Why did you enjoy hurting him?
I enjoy running and I needed a reason to cut our playtime short.
Physically hurting people on purpose and for your own amusement is very wrong behavior. Branding someone causes permanent damage and physical disfigurement. You need psychological help from a professional in order to learn better ways of managing your anger.
What's the big deal? My friend was fine after it happened and it taught the kid to walk properly and not to stop in the middle of the hallway.
Hurting another person is wrong. If you enjoy doing this, you should talk to a therapist to understand why. This behavior will cause a lot of trouble in your life.