Hey i need a little help?

I've have strange things happening and its like i run much more faster then usual and i am much stronger then usual i open the door by thinking of it when i jump i stay in the air for 30 seconds before coming down is it puberty? Im the fast kid in my school now and i used to be the slowest. I used to be bullied but i fought back once and broke the bully's arm with one small punch and i open the locker with my head.Somone please explain to me why this is happening.I don't know what to to so best answer 10 points.