Funny you mentioned your prior Mustang......3 years ago I went down to Tenn. for a high speed autocross event with a friend who had an identical to mine '01 Mustang Cobra vert. We went down to the Tail of the Dragon for a couple of runs the night before the AutoX event. My friend got a little careless and went off the side of the mountain, hitting a tree while airborn and flipped the car sliding down the hillside 100 ft or so. He had a "light bar" in his Cobra (looks like a roll bar but not tied into the chassis, mainly decorative) and I witnessed it save he and his father's lives. It did indeed fold over but it still provided their melons safety room while the car was upside down. I'm betting your roll bar would help you a bit more than you think in the event of a rollover.
