Even though I've talked with some oldtimers who say they've never gotten upside down. Its gonna happen, The chance is always there. Use every safety device you can get your hands on.
That being said, Thanks for letting us know and Im glad he will be fine. The vision and concussion thing is a precaution every safety crew should take into consideration even if a driver jumps out and declairs themselve fine. The should be under observation for at least a half a hour. At least by a member of the team or family.
Chuck, sorry about the car but the most important thing went to school
