All right, it says "out of nowhere".Notice it says absolutely nothing about appearing "behind" him. It is also refuted in Zimmerman's own walkthrough with the police.
He did not "perhaps" hit him, he very obviously did. And I don't know where you take "once" from. Especially given that Z had injuries on the back of his head as well.And yes, perhaps Martin did hit a scary stalker in the face once. Wouldn't you if you thought your life might be threatened by some stranger who weighs 40 pounds more than you do who keeps following you?
Why would I immediately start fearing for my life merely because someone is following me? And if I really feared for my life, I would either try to escape or surrender my valuables. If I thought I have a chance in a fight, I would not hit before trying to clarify the situation with words.
?Why is it so obvious to you that Zimmerman can defend himself while Martin can't?