i saw the accident on a google vid, and although tragic, i was surprised at how unspectacular it was. now please dont get me wrong, it WAS a big accident, and had obvious tragic consequences, but it was almost like he just laid it down and sorta slid off.
it wasnt as if there was legs/arms/machinery going everywhere. i used to follow speedway, and used to see quite spectacular crashes, people locking up and going over the top, into barriers, colliding with other bikes, and they got up and were back out for the next race.
i agree with you nicky about the other rider who clipped him. he will always have that nagging "what if i didnt" to live with.