Perfect Medic vs. Nurse story....Working flight (rotorwing) shift with new flight nurse. All he wanted to do was be able to intubate someone. Tired of all the practice and wanted 'real' patient. Got request for scene flight with local service and information received was for 'cardiac arrest'. The nurse's eyes got big and very happily offered his services to intubate the patient in which I replied, "Hell, I don't care as long as it gets done". As the nurse was getting the airway equipment ready, I began thinking (as a paramedic would), how can I screw with him? We landed at the scene and exited the aircraft. Walking up to the ambulance that housed the patient, I realized this was my chance. I asked the nurse if they had the monitor in which their was this perflexed look of confusion on his face, realizing that he forgot to grab it. He immediately retraced his steps to the aircraft to get the needed equipment. As this was being done, I entered the ambulance via the side door and took airway control. As I was intubating the patient, the nurse opened the back door and viewed me now confirming proper placement with this astonished look on his face. Little did he realize (but which I knew) the service already had a monitor/defibrillator placed on the patient. My only words to him was............ROOKIE! He had never forgotten this incident and still shakes his head everytime there is the possibility of intubation. And you can bet I will never let him forget.