This happened two years ago

I was getting ready with my classmates for PE when suddenly the class bully came up and put a sticker on my neck, but at the same time he hit me really hard. I complained to him about it, and then the teacher came up, I explained to him that it was the bully who started it all, when suddenly the bully (I’m tired of calling him that, from now on we’ll call him Juan) lunges at me. Then, purely out of instinct, I gave him a tremendous slap, Juan was perplexed, as if analyzing what had just happened, and that slap turned into a fight, and we were both sent to the principal’s office, only Juan stayed there longer, for obvious reasons.