Never，ever put yourself in danger! As much as this seems to lack compassion(同情)，remember that being a hero，in this case，means nothing if you come back dead. If you aren’t sure what to do，leave it to the professionals.If it’s not a life-critical injury，doing the wrong thing can harm the patient.See the following tips about training. Do not move the person.It could harm them even more；unless they are in immediate danger.Wait for the ambulance to arrive to take over treatment of the person.