Broken nose? Maybe. Damnit to hell.
Boys are physical. I knew that, but man, they wrestle and fight a little too much for my liking.
At our school, the Kindergarten play yard is separate from the big kids play yard, because of crap like this. Big guys forget to be careful--they only want to win. That is the lesson of the day. Is the win worth it? Do you really want to hurt someone that loves/likes/admires/wants-to-play-with-you just to prove your bigger and better at something? I kind of think that might mean you're not as good as you think, if you have to be a brute about it.
Just say no to being a brute. Play nice. Have fun. Don't make me lose my shit because I will and it will be UGLY!!!!