On September 29, 2004, about 1230 central daylight time, a Cessna C-150J, N61111, piloted by a student pilot, sustained substantial damage when it overran the runway, struck a road embankment, and subsequently nosed over while landing on runway 15 (4,000 feet by 60 feet, asphalt/turf) at the Green Castle Airport, Oxford, Iowa. The local 14 CFR Part 91 solo training flight was operating in visual meteorological conditions without a flight plan. The student pilot was not injured. The local flight originated about 1200. The student pilot submitted a written report of the accident. He stated that he was practicing landings and was performing a simulated emergency landing when the accident happened. He stated that when he was on the downwind leg of the traffic pattern he reduced the engine power to idle. He stated that he turned toward the runway, and applied 40 degrees of flaps. He stated that he touched down about 3/4 of the way down the runway, applied full braking action. He stated that the airplane became airborne again after cresting the uphill grade of the runway and then the airplane "quickly settled back down." He stated that he was about 75 feet from the end of the runway at this point and attempted to turn the airplane to the left to avoid hitting the roadway at the end of the runway. He stated that the airplane went straight ahead striking the road embankment and nosed over on it's top. The student pilot listed no failures relating to the airplane or systems.