Short answer, yes. A friend of mine got jumped in a McDonald's parking lot. The guy jumped him from behind and held him from behind while pounding on him. My friend managed to get a handhold and push the guy backwards into a car. He then proceeded to slam the guy's head into the car about four more times. My friend got charged with assault. The cop (and ADA) told him that he could have gotten away with one head-slam... but after he continued to slam after he had gotten free HE became the aggressor.
Zimmerman could have run up to Martin, called him the N-word, spit in his face and then slapped him. But the moment Martin got on top of Zimmerman and started to bang his head on the pavement, Martin became the aggressor. Period. You don't like it, change the LAW. Open your doe eyes...
In college a friends brother confronted some punks throwing large rocks over the overpass into the paths of oncoming vehicle. One of them came up behind him and grabbed him by the shoulder/arm. He turned, threw the guy off. The fellow lost his balance, fell, hit his head on guardrail and died.
Because the brother was on the wrestling team, the court deemed his body as a weapon. He ended up doing 10-20 for manslaughter.
Good kid, straight A student vs a drop out punk.
If that's the case, they need to change the stand your ground law.