Maybe unrelated, but I give a vote for the brain perceiving things in a hyper-active state. When I go high-speed go karting, my brain needs to work incredibly fast to keep up with every little thing going on. In between sessions, if I play games on my iPhone, it is literally like the game is being played in slow motion. Alternatively, if I wake up in the morning all drowsy and I play those same games, it's as if the games are in fast forward and I can't keep up. So it's obvious my brain is in different states of awareness in these two scenarios, so it would make sense that in a near death experience, the brain jumps into that hyperactive state and things appear slower. Just my opinion.
