All i can say about fighting is...
There is a big difference between sparring, fighting under controlled conditions and fighting in RL.
I try to avoid at all costs doing the latter of the above three.
At times in the ER I have to help deal with drunk, drugged out users or just plain pissed off people, who can get very aggressive to the point of physical violence towards Medical Staff and the other Public.
We've had knives pulled on us, syringes (needles), blunt objects, you name it. Luckly so far no guns. I've been kicked, punched, bitten, scratched, spat on and none of it is nice.
Honestly I am scared everytime I have to try and "fight" with one of these people, but I don't realy have a choice, when it comes to trying to protect one of the Nurses, Doctors or Joe Public.
I'm very aware that I can get hurt, but I'd rather take a beating, than see one of the girls cop a smack in the mouth.
I don't get to pick who I fight with, I just have to hope like hell, they suck at fighting, worse than I do...