Some injuries can appear delayed and among those delayed injures include leg/knee injuries. It is not uncommon after a motor vehicle collision for one to experience delayed leg pain after being thrown forward slamming against the dashboard. In some cases, your body can be in a state of shock and the pain may not appear right away. Although you may not feel pain immediately, do not delay in seeking medical treatment as soon as possible. Once a doctor has examined you, you may be surprised to find out what injuries appear and the severity of those injuries.