I was there and I sure hope that poor SOB who took a nasty tumble came out okay. They had to helicopter him out and I know that wasn't a good sign.
Brian, the driver that took the tumble is doing great and should be out of the hospital today or tomorrow. He got banged up, but thanks to the safety requirement (roll cage, head and neck restraint, and the rest) he came out a little bloody and brused but alive and joking, and planning his next build, dont tell his wife.