The first rule in first aid is to do no harm. This seems like an obvious rule of thumb, but it is one that often goes against what every fiber in your body is telling you to do. In the event of severe trauma to the head, neck or spine, your instinct is to move the person into a more comfortable position or get them to a safer area, but moving them can injure them to a greater extent. If the injured person is in immediate danger or is ready to be placed in an ambulance and sent to the hospital, you can "log roll" them onto a spinal board if you understand and can execute the procedure.