Very interesting story. On the part about people not stopping. I'm not surprised. I've been in a few similar accidents myself and I've never been injured before. The worst that has happened is that the airbag bent my glasses up. So if I saw a similar accident I probably wouldn't expect a person to be injured and I'd rather just go on about my daily business. Even if a person were to be injured, I'm not an EMT. I don't really know what I could do to help somebody. In fact, I'd be afraid of making their injuries worse if I tried to move them and maybe getting sued or something. That is how our society is now.
Don't get me wrong. If I saw some kind of accident and knew people needed help and it was obvious there was something constructive I could do, I would certainly stop. Unfortunately, I can't think of an example of such a situation off of the top of my head. I did stop once, actually, just so I could be a witness to police since I saw an accident actually happen.