At the SOLO II Nationals in Salina in 1986, 2 employees from the Tampa Malibu Grand Prix entered a modified Malibu GP car in AM.
Half way thru a 12 cone slalom, one of the dirvers in this car got the car up on 2 wheels, reaching a 45 degree angle to the pavement, and got the car come back down on all 4 wheels. Both left side tires were pulled off the beads in this incident. I would have never believed this could happen if I had not witnessed it in person.
I have also witnessed a Volvo 144 do a complete roll at the 1985 SOLO II Nationals, and a Rabbit roll in Orlando while driven by a very experienced driver.
Point is, it can happen to any one, at anytime, in any car.