Googled drivers website from German to English,
http://www.basseng.de/5km after passing Uwe Alzen stricken 996 Turbo, Basseng's output shaft tap (threads??), on which the tie rod is fastened, fallow (failed) and the wheel nut with the tie rod flew away, the wheel wound itself under the car.
And then Marc was only spectator: "I went off like a rocket. The speed was not so high, it has begun with approx. 140. When I took off, I had still good 100 drauf. The Porsche rose backwards highly, laterally with the door over the soil and then into the guard rail hit and then has the car begun a wheel to strike. By radio I announced and thought the accident to the box first of tire damage. One first at the accident scene cleared me up that I would have lost a wheel."