Yes I would.
Oh, Jesus. I listened to some airhead on Hannity on Thursday going on about how Zimmerman was
only being punched in the face. It's not like he was in fear for his life, she said.
I've read hundreds, maybe thousands, of stories of people being punched to death. It's not a *expletive deleted*ing bloody lip. You can kill someone punching him in the face, and it happens all the time. As I've mentioned before, I have a condition that would likely blind or kill me if I were punched in the face, but even someone with no physical problems is at risk of great bodily harm or injury from being punched.
In the first defense shooting after Texas passed their shall-issue CCW bill, a driver shot and killed another driver after an accident. The deceased had reached through the window of the shooter's car and was punching him in the face, and was trying to pull the shooter out the window of the car. When the shooter had sustained enough injuries (including a detached retina), he fired, killing his attacker. The DA no-billed him.
According to the man who witnessed the attack (as opposed to talking to Martin on the phone), Martin was on top of Zimmerman, had Zimmerman's arms pinned to the ground with his knees, and was repeatedly punching Zimmerman's face. That sounds like a scenario for some pretty serious damage.