Don't tell the principal, thats wimpy. Simply stand up to him. If you have to use violence, do this : Punch him, as hard as you can right in the nose. Itll hurt like hell to him, and from my experience, it affects thier sight for a short while. Itll make thier eyes water and probably give you a chance to hit him a few more times. Go for the nose again, and then an uppercut to the chin. Make sure the punch to the nose hits hard and accurately, or you'll get the shiat beat outta you. (if hes really so big and tough)
