What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pilot was performing a high speed taxi's on a grass runway (with no intent to fly). On his pass back to the maintenance hangar, as per conversations with a st charles deputy, it was revealed that a cockpit canopy cover was laying loose in the front cockpit, apparently the cover flew out and landed on the pilot sitting in the rear cockpit, which in turn the pilot lost control.
As the FAA filed it
(-23) PILOT WAS PERFORMING A HIGH SPEED TAXI'S ON A GRASS RUNWAY (WITH NO INTENT TO FLY). ON HIS PASS BACK TO THE MAINTENANCE HANGAR, AS PER CONVERSATIONS WITH A ST CHARLES DEPUTY, IT WAS REVEALED THAT A COCKPIT CANOPY COVER WAS LAYING LOOSE IN THE FRONT COCKPIT, APPARENTLY THE COVER FLEW OUT AND LANDED ON THE PILOT SITTING IN THE REAR COCKPIT, WHICH IN TURN THE PILOT LOST CONTROL.