As you approached the patient, you could see instantly that he had multi-system trauma. While darting across a busy interstate, the young man had been struck by a pickup truck, which was now parked farther up the roadway, its windshield and front bumper exhibiting the damage of a high-speed impact. The patient was unconscious, his limbs splayed. He had massive head and facial trauma and deformity to both legs. Each gasping exhalation produced a bloody froth. Your mind immediately inventoried the injuries and you set to work.