What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Following inadvertent liftoff during high speed taxi test on rwy 17 the aircraft climbed very steeply to a height of approximately 30 feet, pitched down to a nearly vertical attitude and impacted the ground on the nose. The aircraft came to rest inverted facing north on rwy 17 at the point of impact. The aircraft is an unregistered and uncertificated amateur built experimental airplane. The pilot holds no pilot certificate or airman medical certificate. The aircraft was substantially damaged and the pilot sustained serious injuries.
As the FAA filed it
(-23) FOLLOWING INADVERTENT LIFTOFF DURING HIGH SPEED TAXI TEST ON RWY 17 THE AIRCRAFT CLIMBED VERY STEEPLY TO A HEIGHT OF APPROXIMATELY 30 FEET, PITCHED DOWN TO A NEARLY VERTICAL ATTITUDE AND IMPACTED THE GROUND ON THE NOSE. THE AIRCRAFT CAME TO REST INVERTED FACING NORTH ON RWY 17 AT THE POINT OF IMPACT. THE AIRCRAFT IS AN UNREGISTERED AND UNCERTIFICATED AMATEUR BUILT EXPERIMENTAL AIRPLANE. THE PILOT HOLDS NO PILOT CERTIFICATE OR AIRMAN MEDICAL CERTIFICATE. THE AIRCRAFT WAS SUBSTANTIALLY DAMAGED AND THE PILOT SUSTAINED SERIOUS INJURIES.