Well there you go then, I've been wrong all these years thinking a commentator was there to commentate.
Airbedane offers
"The first and foremost job that a commentator has is to control the crowd in the event of an accident."
Me thinks organisers/participants of an airshow spend considerable time and energy trying to ensure accidents don't happen. But, yes, they do and mercifully infrequently.
Should one happen then a"Crowd Control" role for a commentator would be the effective use of that resource. The commentators role would be clearly defined in the emergency response plan for the event. That plan would also define access lanes, assembly points and co-ordination centres in such an event. Having access lanes through a crowd area is not acceptable and would be rectified during the event planning phase.
Crowd evacuation is also covered by the ERP.
Old Warden was mentioned a couple of times and seems to hold some revered place, does it have a ERP
To suggest commentators primary role is crowd control overstates their important though commentating role.
ding