 On the morning of the race , a warm @-@ up session lasting half an hour was held as a final preparation for the teams . Mercedes No. 4 , repaired after its Thursday accident , joined its two teammates on the circuit as the session began . Webber was once again driving the No. 4 car as the trio made their way down the Mulsanne Straight . Approaching Mulsanne Corner , Webber trailed his two teammates but was approximately 15 m ( 50 ft ) behind a Chrysler Viper GTS @-@ R entered by Team Oreca . Cresting a hill at the approach to the corner , Webber 's car lifted its nose into the air once again and rose over 9 m ( 30 ft ) above the track , somersaulting backwards before twisting towards its right and hitting the tarmac with the right rear of the car while inverted , shedding its engine cover , rear wing , and nose . The car skidded on its roof into a run @-@ off area just short of the roundabout next to the Mulsanne Corner before coming to a halt . Marshals were eventually able to right the Mercedes and extract Webber , who sustained no major injuries . Television cameras located at Mulsannes Corner captured the aftermath of the accident and broadcast pictures of the CLR on its roof to the worldwide audience . Photographers in the same location also captured the car as it flipped . The ACO later published these photographs in its 1999 yearbook . 
