He is 13yrs. healthy, thank goodness but I understand the quick actions of a teeneager and I also understand how they can be justified at times...don't be too hard on yourself.. as I have RSD the worst in my rt. leg also and if I got hit there, which I did..a at my son'e football practice... goofing around.. a kid kicked a football up way high in the air... and guess where it landed..square on my knee... (my RSD was associated with rt. knee surgery)...if I wasn't a lady, a Mom..I'd trucked after this kid also but opted to bite my lip and cry!!Your good..all good!!! AND that comes from a MOM..