I competed in that race last year and the driver stopped at one of the worst possible spots on the track for a pile up. Not only is it at the end of a straight, but the surface changes there to create some “interesting” braking issues. I received a bent frame in one race as proof.
Really sad that both the driver and the competitor that stopped to congratulate him were DQ’d after so much effort and success, but the move could not be tolerated. I wonder if the drivers could have been given the option of paying a fine, however.