I'm a 30 year old white man and if i saw someone staring at me and talking on a phone as I walked home, I'd run like hell too. That's not suspicious, that's a normal human reaction because guess what, to the guy on foot the person in the vehicle is the suspicious one. Funny how perspective changes when you look at the situation form the other guys point of view. Even more so when I was a teenager, and this is someone who gew up in good old white suburbia.
I'm a 33 year old white male and I've been in this situation several times, when I was 16 and 17, and I never ran. I've literally been in this position. I was walking down the street and I was confronted by someone who lived a few blocks away from me accusing me of vandalizing their house. I didn't run, I waited for the police and explained to them that I lived in the neighborhood, had no idea who this guy was or what his problem with me was, and that ended it. There was zero evidence that I had done anything wrong, because I hadn't. And if you did run, it would only make you look like you had done something wrong, hurting your case in the long run.
What suspicion? What made Martin suspicious to Zimmerman that his first thought was to call the police, when no one else in the neighborhood did, until the fight/shooting?
He was walking down the street in the rain and Zimmerman felt he was looking into houses, and he matched the description of the people committing B&Es in the neighborhood.
Again, this line of reasoning you're going down is basically this
Even though there's been several break ins in the area, and Martin matched the general description of those involved and even though he was walking alone with his face concealed in the rain, and had at least the appearance of being out of place and looking into homes, and even though Zimmerman was the head of the neighborhood watch and was driving on his way to the store and called the police first and never approached Martin directly, he was still in the wrong because he called the police and got out of the car.
I'm saying it takes a completely different moral outlook from what I have and what I think most people have, to think that Zimmerman was in any way in the wrong, I guess. Normally people like this would be hailed as the good guy, trying to prevent crime in their neighborhood, but when something goes wrong, suddenly all the blame is on them for doing...exactly what they should have done.