There are some good points there Charlie, something that has crossed my mind recently regarding the marshaling of "Very serious " incidents is the human shock element. Massive accidents that cause the instant loss of life are not something witness by many people in their lives, even TT or MGP marshals will rarely witness such an event, so could it be, not in the Kirk Micheal case, but in some other cases that the shock of such a big accident can make people react in a way that with hindsight they wouldn't do and perhaps momentarily forget all the training that they may have had?
Russ