[Wbulk]

You would be surprised how easy it is to flip a car without hitting something. Over the years I have investigated a lot of roll over accidents. Typically for some reason the car went sideways at speed causing the tire to roll away from the rim. The tire then immediatley loses it's air and rolls away further from the rim edge. The rim then catches the asphalt, digs in a flips the car. You can just about always see the exact point on the road where the rim caught and flipped the car. Cars with lower profile tires tend to roll less as they tend to slide rather than the tire roll off the rim.
Even the best of drivers can get into a situation where he is trying to avoid an object or car, or deer, and finds himself sideways. Speed, weight, tire sidewall width, all play into if a tire breaks it's seal and loses it's air, and the rim digs in and flips the car.