Circumstances
The pilot reported that during engine start, he used small chocks placed around the tires and did not tie down the tail of the airplane. On the first attempt to hand-prop the engine, it did not start. The pilot then advanced the throttle "very slightly." The engine subsequently started, and as the pilot was moving toward the cockpit, the engine rpm increased. The airplane taxied out of the small chocks and began turning in circles. The pilot grabbed the right horizontal stabilizer, but the airplane continued to circle while dragging the pilot. It struck a parked airplane before coming to rest.
Post-Accident Examination
An examination of the airplane by a Federal Aviation Administration inspector did not reveal any preimpact mechanical malfunctions, nor did the pilot report any. The inspector noted substantial damage to the empennage.