On November 15, 2014, about 1030 eastern standard time, a DeHavilland DH82A Tiger Moth, N28681, was destroyed during collision with structures and terrain following a loss of control in flight at Peach State Airport (GA2), Williamson, Georgia. The private pilot sustained minor injuries, while his pilot-rated passenger was seriously injured. Visual meteorological conditions (VMC) prevailed, and no flight plan was filed for the personal flight, which originated from GA2 about 1020. The flight was conducted under the provisions of Title 14 Code of Federal Regulations Part 91.The pilot was interviewed by telephone and provided a written statement. He said the purpose of the flight was to familiarize the passenger with the operation of the airplane. According to the pilot, the preflight inspection, engine start, warm-up, taxi, and takeoff were conducted with no anomalies noted. He briefed the passenger that he would depart from runway 31, perform some turns, and return over the airport in order to enter a right downwind for landing on runway 13. The airplane's engine power and performance were "good" and the airplane demonstrated its "gentle" handling characteristics through both left and right 30-degree bank turns. The pilot said he crossed the airport about traffic pattern altitude, and then remembered being in a vertical, nose-down descent. He said he had no recollection of how the airplane transitioned from level flight to descending nose down. The pilot stated that he held the control stick fully aft during the descent, and that the elevator gained enough authority to level the airplane just above ground level, as he flew between a parked airplane and the airport restaurant. The airplane then collided with a flagpole, the restaurant, and terrain before coming to rest upright. The pilot said that once the airspeed increased sufficiently during the descent, he had full flight control authority. Photographs of the wreckage by a local media outlet revealed that the entire tube and fabric structure of the airplane was completely destroyed. A flag and flagpole were seen entangled with the wreckage. The engine and propeller were not visible. According to Federal Aviation Administration (FAA) and maintenance records, the airplane was manufactured in 1945. Its most recent annual inspection was completed October 3, 2014, at 1,749 total aircraft hours. The pilot held a private pilot certificate with a rating for airplane single engine land. His most recent FAA third class medical certificate was issued in April 8, 2014. The pilot reported 1,400 total hours of flight experience, of which 305 were in the accident airplane make and model. The pilot reported that there were no mechanical deficiencies with the airplane that would have precluded normal operation.