All the evidence is on your side.
Given Zimmerman’s law enforcement demeanor, and his watch captain type, having a concealed weapons license and being armed, and having been involved in this long period of watch captain surveillance and sustained communications with 911, it seems to me more likely that if he confronted Trayvon, he would maintain distance and be ready to deploy his gun.
His pistol would be the focus of his asserting control over, or a defensive posture from, the stranger that he had been watching and discussing with the police.
What kind of grown man under those circumstances would instead be leaping on the person he is watching, to grapple and fist fight, possibly against a knife, exposing his useless but present pistol to whatever might come from it.
What we know for sure, is that all of the resulting physical evidence exactly fits Zimmerman’s claim of being attacked.
Wow... You and I finally agree on something? A banner day for sure. ;-)