I have to respectfully disagree.
How about this. You and I get in a fight. At some point, I start "winning" the fight.
During the fight, you get a bloody nose, and while we're on the ground wrestling back and forth, you scrape your head.
At what point would you consider your life to be in danger?
I'm just going by the scrums that I have been in, and received MUCH worse injuries that what Zimmerman appears to have, and never, not once, been in fear of my life.
Not just that, but he did not meet force with force. That is a KEY part of the Florida law.
Also, as an asside, I noticed in the police report that the officer who put handcuffs on Zimmerman made mention of the grass and moisture on Zimmerman's clothes. However, what it DOESN'T mention (and maybe it's in another report that is not public) is that there was blood splatter.
IF he was pinned down by Martin, and say Martin was choking him, and he was able to get his gun and fire at Martin point blank while Martin was on top of him, he would have been COVERED in blood on his front.
Nothing about that.
So, something tells me, (and again, this is just speculation) that Martin was at a distance. Like, more than 10' or so. If it had been point blank, Zimmerman would have had blood splatter on him. If he had shot him while Martin was on top, he would have been covered in blood. (Gravity would have forced Martin's now lifeless body to give out, falling on top of Zimmerman. Blood would be all OVER Zimmerman. Also, in the course of getting up, Zimmerman would have most likely rolled Martin off of him, which would have put him face up in the grass, not face down.
But again, this is just my speculation, and assumptions, based on my reasoning and understanding of the facts.