The commercial pilot, who had a total flight experience of about 4,500 hours in conventional airplanes, was learning to fly weight-shift-control (WSC) aircraft with the expressed intent of purchasing a high-performance WSC aircraft. The pilot obtained all of his 13.5 hours of WSC experience, including his WSC pilot and instructor certificates, in the two weeks before the accident in a docile, low-performance WSC aircraft with dual seating. Despite being explicitly warned by his instructor that he was “not qualified” to fly the specific model high-performance WSC aircraft involved in the accident, the pilot persuaded an owner of a high-performance WSC aircraft to allow him to fly it solo. The owner reported that the engine start, taxi out, and run-up appeared normal. The wind was light. Witnesses reported that, on takeoff, the aircraft climbed rapidly and entered a steep right bank/roll from which it did not recover. The flight lasted about 16 seconds, and the aircraft reached a maximum altitude of about 80 feet above the runway. Detailed examination of the wreckage did not reveal any mechanical deficiencies or failures that would have precluded normal operation, and data from an electronic engine control indicated that the engine operated normally throughout the flight. The pilot’s autopsy did not reveal the presence of any debilitating physical conditions or impairing drugs.