Thanks for the news article, though unfortunately it doesn't say much. We still don't have too much of an idea as to what happened exactly. Based on what's already said here, i guess it's a case of 2 drivers colliding with each other, resulting in one person getting bounced off the track, which soemhow caused the car to flip a MAYBE end up with the driver himself hitting a wall instead of the car itself, causing the driver to absorb an immense amount of shock himself and ultimately causing his death.
All I can do now is speculate, since there's still not a terribly large amount of info available here. Is the scenario I described above a rough picture of what happend? Please confirm.