I talked to one of the crew members for the Formula 1 pilot who was in the 3rd position of that race. He said Hubler was on the Pole, with Somes outside. As they approached the first pylon, Somes allegedly cut too hard to the 1st pylon, clipping the tail of Hubler's plane. Hubler obviously lost control and hit the ground. At least, that was the view from the third place aircraft...