The airplane, a civilian Douglas A4A, was engaged in filming a commercial which required the pilot to fly over a Ferrari vehicle. The pilot had completed a low filming pass over the vehicle and was circling the area while the film crew was preparing for another low pass over the vehicle. Ground witnesses reported that the airplane then entered a shallow descent and rolled into inverted flight. The left wing struck the ground, while inverted, and the airplane began to cartwheel. The main fuselage area was found about 2000 feet from the initial wing impact point. The post accident wreckage examination disclosed no evidence of any preimpact malfunctions or failures. No medical evidence was found to indicate any condition to impair the pilot. The pilot had attempted to eject from the aircraft. The seat had fired and the seat was found 52 ft north of the fuselage area. The pilot's parachute had deployed and was found adjacent to the cockpit area.