In this situation Zimmerman has to come up with something that removes Martin's well-grounded fear for his life ~
BTW, we know it was a well grounded fear because, as it turned out, Zimmerman shot Martin and killed him. Among other things that proves that Zimmerman was 'chasing Martin with a gun".
This is exactly what a teen should do when being followed, both by car and then on foot.
The known fact that Martin avoided confrontation and the equally known fact that Zimmerman's actions were aggressive (what do you think stalking is?) are thrown out the window by those here who want to believe that Martin, to quote a freeper, "surprised and attacked" Zimmerman.
They also ignore Zimmerman's documented legal history of violence while suggesting without any evidence that Martin was a thug.
Zimmerman will spend the rest of his loser's life looking over his shoulder at the very least. He will always be the guy who killed that kid. He will also find certain freepers always ready to shake his hand and buy him a beer.