Emergency Medical Technician here (from France). Disclaimer: I'm just speculating as I have no specific knowledge of what happened in this particular accident.

Emergency Medical Technician here (from France). Disclaimer: I'm just speculating as I have no specific knowledge of what happened in this particular accident. Depending on the height of the bumpers involved, I would suspect several possible problems: one or both femoral arteries severed; or both femurs fractured; or the pelvis fractured; or some combination of these. Even if the arteries were untouched, fractures of both femurs or the pelvis cause life threatening blood loss as these are heavy bones which have major vascularisation (to allow blood cells generated in the marrow to enter the blood stream). A closed femur fracture is a 1000 mL to 1500 mL loss of blood (per femur). An open femur fracture is double that. A pelvic fracture can go to 5000 mL (approximately the total volume of blood in the average adult male). In the field, major lower limb arterial bleeding can be controlled with tourniquets; femur fractures can be somewhat reduced with traction splints; pelvic fractures can be somewhat stablised with pelvic compression devices... However all of these scenarios are bad news for the patient and require rapid evacuation and surgical intervention (ideally in less than 1 hour from the time of injury) to have a chance of saving the person's life. RIP and condolences to patient's family.