Witnessing a road incident is very different from saving and rescuing the patient, it needs both a knowledge and skill so that you will not worsen the situation and the injury of the person. In this instances, first our a respondent you need to introduce yourself politely and inform the victim your intention in helping her. Second, the victim is shaken and got a minor injury, we need to check further, make the victim calm down and telling the victim that he is safe already. Then, report the incident and ask for help, ask them to call an ambulance that would bring the victim to the hospital for proper treatment. While waiting for others to help you, do not leave the victim if the scene is not safe and explosion might occur, you need to transport the victim.
