What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The accident aircraft and pilot had just completed an instruction flight and debrief. The instructor pilot was initiating a flight to return to south county airport (E16) and upon initial start up of the engine, the engine went full throttle. The aircraft veered right 90 degrees to its original parked postition and collided with two other parked aircraft coming to rest in a near vertical nose high position resting on the tail of N1806G with N800NA being dragged behind with the control cables of the accident aircraft wrapped around N800NA propeller and spinner. The engine stopped when the aircraft came to rest on the propeller as it struck the ground when the accident aircraft rode up the tail of N1866G (the accident aircraft is a pusher with the engine and prop in the rear).
As the FAA filed it
(-23) THE ACCIDENT AIRCRAFT AND PILOT HAD JUST COMPLETED AN INSTRUCTION FLIGHT AND DEBRIEF. THE INSTRUCTOR PILOT WAS INITIATING A FLIGHT TO RETURN TO SOUTH COUNTY AIRPORT (E16) AND UPON INITIAL START UP OF THE ENGINE, THE ENGINE WENT FULL THROTTLE. THE AIRCRAFT VEERED RIGHT 90 DEGREES TO ITS ORIGINAL PARKED POSTITION AND COLLIDED WITH TWO OTHER PARKED AIRCRAFT COMING TO REST IN A NEAR VERTICAL NOSE HIGH POSITION RESTING ON THE TAIL OF N1806G WITH N800NA BEING DRAGGED BEHIND WITH THE CONTROL CABLES OF THE ACCIDENT AIRCRAFT WRAPPED AROUND N800NA PROPELLER AND SPINNER. THE ENGINE STOPPED WHEN THE AIRCRAFT CAME TO REST ON THE PROPELLER AS IT STRUCK THE GROUND WHEN THE ACCIDENT AIRCRAFT RODE UP THE TAIL OF N1866G (THE ACCIDENT AIRCRAFT IS A PUSHER WITH THE ENGINE AND PROP IN THE REAR).