On August 11, 2003, about 1830 Pacific daylight time, a Cessna 150, N8515J, made a hard landing at Angwin-Parrett Field, Angwin, California. Alliance Mission Services was operating the airplane under the provisions of 14 CFR Part 91. The private pilot, the sole occupant, was not injured; the airplane sustained substantial damage. The personal local flight departed Angwin at an unknown time. Visual meteorological conditions prevailed, and no flight plan had been filed. According to the Federal Aviation Administration (FAA) inspector, the pilot stated that he extended the flaps 20-degrees. The approach did not look right so the pilot attempted a go-around. During the go-around attempt, the pilot lost directional control of the airplane, it touched down hard, and then rolled off of the runway. The nose gear folded under the airplane, resulting in damage to the firewall. The National Transportation Safety Board investigator-in-charge made repeated requests to the pilot for the completion of NTSB Form 6120.1/2. However, he did not respond.