report I heard the passenger side door blew open (suicide style) and he lifted quickly.....car blew off all the body panels then whn it hit the cage could only do so much.
The is a slide show of the incident, it happened at the 5 mile marker.
they choose the ambulance due to the extent of his injuries and assessed the chances of living to minimal/none.
they put him in the ambulance and called the t.o.d en route to avoid having the track shutdown for investigations .... happens more than you would know
More info, the car rolled for a mile before coming to a stop. During the impact his leg was severed and he bleed out before the EMT's arrived.