You should try to listen to Zimmerman's reenactment, they really don't square up with his own police call very well at all, as Uniboogie noted. Among other things, we never hear the responder tell him to move his car, and we never hear Zimmerman move his car, which he says happened. He claims in his reenactment that Martin ducks between the rows of houses, but then comes back, circles his car, and then runs off again, at which point Zimmerman exits his vehicle. But in his police call, he states that Martin is near the clubhouse, and that he walks by him and starts running, and *this* is when Zimmerman exits his vehicle. I can't think of any way to reconcile these, and apparently neither could Zimmerman.
Then there's the first attack, which in one version knocks him straight back (and away from the fight scene), but in another causes him to stumble around.
And as Serino said, a person whose had their head bashed against concrete shouldn't just be walking around a second later, and a person who is being suffocated can't scream. Combine with that the canned dialogue, and the supposedly freakish behavior that he ascribed to Martin. The running back and forth, the car circling, the mysterious reappearance and homicidal rage, the movie dialogue. The simple fact is, he can tell his story consistently as much as he wants, but it doesn't match much of anything, and it simply makes no sense.
Sheesh! I had thought that maybe his reenactments were being distorted through word of mouth, but it turns out, folks were repeating him accurately - even his own father's early press release stating that Zimmerman never followed Martin.