Mark,
Do you still want to run at this event

they did not even go near the driver to check if he was injured. More intent on get things cleaned up for the next run to keep the event on time.
I thought for CAMS events you need to have a door net to stop an arm from doing this. Mind you, once I saw the driver get out and immediately put on his "Wally Hat", I had no further concerns for his well being.

Have a look on You tube, this guys has done it before
They do need to look at their safety first intervention procedures, before they clean up, though
I have never run there but after seeing what happens, I don't think I need too. I may be Old and stupid for competing whilst older than 50, but there are a few more years left for me to enjoy motorsport by not competeing at this event.
David