I watched the walkthrough, when it was released on the news, and I watched it again, when it was linked here, because the news started talking over the video, at the point where Zimmerman was explaining how he was holding Trayvons hands out. I listened to the audio, again, last night. The order of the interviews appears to be, one period of questioning the night of the incident, a few hours later (now after midnight dated 2-27) another interview, then the walk through, the following morning. By the time we get to the walk through, I can already see blatant spots where he is not sure of the actual order of events such as the 911 conversation. When they are standing at the opposite street, he recalls part of the conversation that didn't happen, and then starts confabulating them with things that did happen. Then he realizes, "No, I was standing over there when the operator said this." You can see his memory is really starting to fail but he appears to be trying to keep things in order but no matter how hard an individual tries, they are going to fail at remembering every detail. Our brains will fill in that detail, subconsciously, to maintain the story. It is very possible that he does not remember exactly where
Trayvon approached the car. We do know, though, that there was a point that Trayvon approached the car because he was narrating it. Of all things, what do you think his reason is for lying about that?
Ok, on this note, there's a theory that more closely matches the facts and seems to be where Serino is as well. NOTE: This is my theory. It seems to fit, but I'm not saying it's all true. I don't know, ok? Speculation ahead!
George sees Trayvon and pulls up by the clubhouse. He does NOT park in the lot, as he said, but stops by the curb. That's when Trayvon walks past him. He's not lying about that, yet. So he follows him on a slow drive. This fits the timeline. He's over where he jumps out in less than a minute. He drove there and never stopped at the clubhouse. He's lying about this because following him in his car the whole time makes him look like a stalker.
Trayvon sees him doing the slow drive and runs. George follows.
So he arrives somewhere near the T and jumps out of his car. This is way past the time that Trayvon walked past his car. There is no circling of the car since as soon as he arrives near the T he jumps out and follows.
Next, here's why I think they ended up 25' south of the T. He tells the dispatcher that he's following and when he's told to stop, 1:20 later he hangs up. So maybe he wasn't even parked where he says. Maybe he parked in a different spot than he claimed. The timeline would fit better. At some point, near the T, he finds Trayvon. This is only a few minutes from the first moment he calls the police, and Google maps says it takes 4:00 to get from 1440 to the T on foot.
Zimmerman does his "What are you doing here" routine. Trayvon does his "why are you following me for". Zimmerman grabs him by the arm and Trayvon punches him. Zimmerman goes down or simply backs up. Trayvon runs back south. This would explain why witnesses saw them running past, either one of them or both of them.
Zimmerman runs up to affect his citizen's arrest and they fall to the ground. Zimmerman could very well be the person screaming, but maybe just to get someone to help him detain the kid. There is no evidence that punches are being thrown here. Trayvon gets up on top. Maybe they roll around and swap places.
At least this scenario would explain the timeline and where they ended up. As I said, this is what the police thought as well, which is why they kept asking him if he tried to detain the kid.
ETA: And in this scenario, George could indeed have been scared. But his dishonesty revolves around removing any mention of his own actions that led to the fight.
Remember, in his version, he never says a single word to Trayvon. Not once! And yet Trayvon attacks him and wants to kill him, saying "you gonna die tonight, ************" all without George ever giving him any provocation at all! This is where I think George is doing the most lying. He wanted to catch Trayvon and made some sort of attempt to do so. That's what caused all this.
Again, that's clearly what the police thought, and nothing else explains George's many lies.