At about 1300 Pacific time, the airplane was destroyed when it impacted flat desert terrain. The pilot and sole occupant was seriously injured. Visual conditions prevailed. A helicopter emergency medical services crew witnessed the accident. They watched the airplane complete several “tail slide” maneuvers and then saw it flat spin and hit the ground. They responded to the accident site, assisted with the extrication of the pilot from the airplane and then transported the pilot to a local area hospital.