Shortly after takeoff on a scenic flight, the passenger commenced taking photographs. In the process, his goggles became partly dislodged and began striking the rear cockpit. The pilot reached forward to rectify the situation and, as he replaced his hand on the throttle control, the engine failed. Because of the low altitude of the aircraft, the pilot was forced to land in a rough boggy area within the airfield boundary. The aircraft struck a large depression and nosed over shortly after touchdown. The pilot reported that he had inadvertently knocked the rear ignition switches to the off position, probably with his jacket sleeve, as he reached forward to help his passenger adjust the dislodged goggles.
