Final answer:
If a man is unresponsive after a lightning strike, start CPR immediately if there are no signs of breathing or circulation. Assess for burns and apply ice packs to burns after stabilizing the patient and ensuring medical help is on the way.
Step-by-step explanation:
When treating an unresponsive man who was struck by lightning, you should begin CPR (cardiopulmonary resuscitation) immediately if the person is not breathing or showing signs of circulation such as movement or coughing. While treating lightning strike victims, assessing for burns is a step but it follows the initial checks and resuscitation efforts. Applying ice packs to burns should only be done after medical help is on the way and the person's condition has been stabilized, as immediate concerns are ensuring breathing and circulation. Elevating legs can help with shock, but should not be the first step in the absence of circulation and breath.