You should check to make sure that everyone is okay or whether they need an ambulance to come out to the scene. Check with everyone in your vehicle first and then go to any other vehicles involved in the crash to check. If someone is badly hurt, call emergency services. An ambulance will come right out. Remember, that nothing is more important than people’s health.
Of course, if you are the one who is badly injured, ask someone else to call for an ambulance.