If you watch the video closely, you can see the tire blow out and it looks as if it took out some of the rear suspension. Car launches and looks to hit the underside of the concrete bridge footing. That he got out of it alive is amazing and speaks well for the safety equipment, even in those days. Response was lacking but he made it. He went on to race Le Mans three weeks later. Tough guy!
https://www.youtube.com/watch?v=3mD_D78zo3I