I was at the event where this specific roll took place and the cause of the roll was a 205/55 summer street tire rolling all the way onto the side wall, not coming off the bead though, and cathcing the lip of the rim on a rough asphault. There was a clear point in the loss of control where the marks went from rubber on asphault to alum. wheel on asphault and you could even pin-point exactly where the wheel caught under full load and just unsettled the car enought to sent it over on the roof. After the incident everyone figured low tire pressure, but cooled down each tire was within 1 psi of 45lbs. so no tire came off the bead. So this is a case where a soft sidewall and lots of grip in a front heavy car caused a "tire failure" in a round about way and flipped a car. The same thing could have happened on the street in a collision avoidance situation.

One thing to point out though is that a regular Lancer has fairly narrow wheels I think, so perhaps he just had too wide of a tire and too narrow a rim for the sidewalls to work effectively. I have virtually identical tire on my car to what this guy was driving, but with a correctly sized 6.5" wheel width.