Not high priorities on a 17 year old male. Fearing that he was a narc would be much higher on his list.
Of course, this does cut both ways. If he thought he was a Narc, why didn't he run away? If he thought Zimmerman was out to hurt him, why didn't he run away?
He tried to evade initially, and from the alleged phone conversation, it sounded as if Zimmerman caught up to where Martin was and a scuffle ensued. It'd seem more likely that Martin didn't think the guy was a Narc, otherwise, he would have bolted. The context from the conversation on the phone is that Martin wanted to know what the heck this guy's problem was. Heck, maybe Martin threw the first punch (though Zimmerman says Martin jumped out from no where). Or Zimmerman tried to put a hand on Martin, which led to Martin throwing a punch, or possibly just pushing Zimmerman, who fell backwards and onto the ground.
What we do know is that Zimmerman doesn't have wounds consistent with a serious attack. We do know Zimmerman's mindset based on the 911 call. Most of Martin's mindset is unknown and based solely on the alleged phone conversation, which if true, puts Zimmerman in trouble over the whole being ambushed by Martin claim. Zimmerman's behavior after the shooting was one of a sociopath. It was like he had killed a mosquito.
