In 1954, the #61 Panhard X84 of Eugène Dussous and Jacques Savoye crashed out on the first lap.I haven't been able to find any pictures of the car.
In 1966, the #10 Bizarrini spyder spun as it accelerated away from the start and found itself facing the wrong way. It could have been disastrous, but everyone avoided him:
It retired only 8 laps later with clutch failure.