In a Facebook post after today's incident, event organiser Vince Lettice described it as a "freak accident".
"We would just like to say that this was a terrible accident that happened at the Hangar this morning, our thoughts are with Scotty's wife, and hoping [for] a speedier recovery from this freak accident."
Mr Lettice said he had helped to remove the car, which had rolled into the woman and another car.
Incidents like today's could happen at even the best run and organised events, he said.
Police said they had concluded a scene examination.
Staff at The Hangar said they had been advised by management not to comment on the incident.