“If anything, Zimmerman probably showed the gun, told the kid to get down, mounted him, and shot him.”
LOL, that speculation isn’t supported by the facts known, and the opposite IS supported by audio from witnesses.
And in the sentence after that, I explained what could have led to the bruises Zimmerman received. None of the eyewitnesses place the kid on him throwing punches down. The eyewitness accounts based on the calls show Zimmerman on the black guy, who is face down.