Admittedly, Hall's performance was absolutely phenomenal. He destroyed a very strong field, and I can't wait to see what he can do at Beijing.
Still, I think that he let his emotions dictate his race-plan after he made his move. He must have felt great breaking away, but there was a long way too go. In the marathon, you can feel great at 20 miles (or later) and then fall apart a few miles later. Losing KK was a good idea, but why did he continue to hammer after it became clear that he was running away from everyone?
Hall must have known that he was in amazing shape, but he also should have remembered how inexperienced he is. The marathon is not a distance to be trifled with.