Here's my dad's take on it, he's a DE driver/instructor for AMG/Mercedes.
I see these accidents on the track all the time, then try to figure out why it happened. But I was not there to see this one so I can't say how it went. But we have to yell at newcomers all the time to stay in your car after any accident unless it is on fire. The safety gear in the car will protect you from harm, to get out of a car and stand on the track is beyond stupidity. No racer would ever run over some other racer on purpose. IMHO. :-)
He's got more track time then most of us on this forum, so figured his two cents would be interesting.
And, no, even he doesn't get to drive my car.