You are driving down an isolated road. As you round a curve, you are surprised to see a car that has crashed into a tree. You pull over, then carefully check the scene and approach the car. You find a woman who is awake but very anxious and in obvious pain. The woman tells you she cannot move her legs, which appear to have been crushed by the collision. You dial 9-1-1. As you wait for emergency medical services (EMS) personnel to arrive, you can see the woman's condition is changing. She is now breathing faster, looks pale and appears drowsy. As you check the woman, you touch her hand and notice that her skin feels cool and moist. A moment later, the woman becomes unconscious.
Think about this situation and what the chapter is about before you post.