I would suggest not using the MMA pics as exact models of what Trayvon did. He wasn’t an expert.
Second, the witness quote never uses the words “sitting on Zimmerman’s chest”.
Does say “on top of him” and “astride him”.
This was at night and this witness wasn’t in immediate proximity, so all he could see is what he could see, at night and from his vantage point.
I would say Zimmerman had an advantage in one respect about the gun...he KNEW he was armed and where it was, whereas Trayvon didn’t know either one when he jumped him.
My money is on Z being able to find a way to get that gun, and I don’t believe for a second that this will be a problem for the defense to explain.
Just sayin’, though, the defense is not required to prove Zimmerman innocent...the prosecution is required to prove him guilty beyond reasonable doubt.
And a 'banglist' (((ping)))
IIRC, Mr. Zimmerman said that while he was on his back, Mr. Martin saw his gun (which was in his holster/waistband), and made some remark like "Now I'm going to get you", and grabbed for the gun. Zimmerman did too. Guess who probably got it by the barrel and pulled on it while it was aimed at his chest?