I did that once on I-275, but I only rolled once so maybe it doesn't count. Or do I get bonus points for a simultaneous 360º roll and spin? I can tell you this: it's not much fun being upside-down in your car, looking out your front window at four lanes of oncoming freeway traffic.

The officer who wrote up the police report could not get it through her head that I hadn't left the pavement. (I was rear-ended at the "perfect" angle by a car that was the "perfect" height to lift my rear bumper at the "perfect" speed to completely flip the car....) I would tell her what happened, and she would repeat back to me, "So he hit you from behind, you went off the road, then you rolled." It took three or four of those cycles before she accepted that I had never left flat pavement.

Beyond that, the only "rolling on flat pavement" I've encountered has been drunk drivers who swerve recklessly in poorly balanced vehicles (particularly SUV's), perhaps while hitting a pothole or other road surface defect, and major mechanical failures. (Non-drunk drivers have fallen victim to similar rollovers; but I'm speaking here of cases where I have first-hand knowledge.) You say the car was a rebuild - do you know what, exactly, was rebuilt? Did you have a mechanic look over the wreckage to try to determine why the vehicle rolled? You may have had such a failure.