"He says, 'Oh he's right behind me, he's right behind me again,'" Crump says the girl told him. "She says: 'Run.' He says, 'I'm not going to run I'm just going to walk fast.' She hears Trayvon say, 'Why are you following me?' Other voice says, 'What are you doing around here?'"
She told Crump they both repeated themselves and then she thinks she heard Zimmerman push Martin "because his voice changes like something interrupted his speech." She heard an altercation and then the phone call was cut off.That's certainly a plausible explanation of what happened. Or perhaps he pushed Zimmerman. This really isn't enough to tell what happened. Even if Zimmerman pushed him, how did they end up on the ground, with Martin on top? It might well be that Zimmerman struck the first blow, and that still would not destroy his claim that he was acting in self-defense when he shot Martin. It would, however, argue that Zimmerman was really lacking in judgment in chasing Martin, and even more lacking in judgment if he hit Martin.