What happened
During an airshow routine, a pilot with 1,700 hours of flight experience was performing low-altitude aerobatic maneuvers following takeoff. According to a witness present at the event, the initial takeoff roll and rotation appeared normal, though the aircraft was traveling at a slower speed than usual for this routine.
As the pilot rolled the aircraft into an inverted position, the pitch angle increased beyond normal parameters, and the expected gain in airspeed failed to materialize. The right wing of the aircraft remained low as the pitch angle increased while the elevator was in the full down position. This sequence led to what was described by a witness as an inverted stall situation. The aircraft subsequently descended into the runway in an inverted state, which resulted in a post-impact fire.