VEHICLE USED IN POLICE TRAINING AT ACADEMY SETTING. DATE OF TRAINING, NIGHT, CERTIFIED INSTRUCTOR DEMONSTRATING PROCEDURE. RECRUIT IN PASSENGER FRONT SEAT, 2 RECRUITS IN BACK SEAT. ENTERED SKID PAN, WET, INTO 360 DEGREE UNDERSTEER SKID. AIR BAGS DEPLOYED. DRIVER'S WENT TO RIGHT AND PROPELLED REAR VIEW MIRROR WITH VELOCITY TO BACK SEAT BETWEEN RECRUITS. PASSENGER SIDE AIR BAG DEPLOYED DOWNWARD, STRIKING PASSENGER RECRUIT CAUSING GROIN PAIN. NO IMPACT OCCURRED.*AK