How does Martin know Zimmerman has a gun? The only way he would know is if Zimmerman had drawn down on him. I would believe if Martin had seen a gun, he would have fled rather than go fist fighting with a man that had a gun drawn.
I guess judging by your post it is acceptable to beat the **** out of anyone that is following you. I'm sure Martin would have been on the defensive about some dude following him but just because someone is tailing you does that give you the right to attack?
pure speculation..
kid should have called 911 right?? "some dude following me in his vehicle... hold on, wait, he got out and is running after me because I tried to get away from him"