James Hinchcliffe's practice accident at Indianapolis looked pretty nasty, but not particularly life threatening. However Racer is reporting that the Canadian's life hung in the balance after the impact.
The right front suspension was punched through the carbon fibre tub of Hinchcliffe's Dallara, passing through his right thigh, left thigh and then spearing up into his pelvis.
When the Indycar team arrived at the scene Hinchcliffe was in the process of bleeding out, presumably because one or both of his femoral arteries had been severed by the suspension.
The work done by the safety team should be highly praised. When they arrived at the scene Hinchcliffe was impaled in the car and losing blood at a life threatening rate.
Extracting and stabilising the driver in these circumstances was a magnificent effort.
The dangers of sending drivers around a concrete-lined bowl at speeds in excess of 230 mph have never been more apparent.