What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The flight instructor was demonstrating a power off 180 to his student at Montgomery-gibbs executive airport. During the landing rollout, the instructor was unable to stop the aircraft before reaching the end of the runway. To prevent going off the runway edge, the instructor made a high speed left turn onto taxiway f. the aircraft skidded in the turn and destroyed the runway marking sign before coming to a stop.
As the FAA filed it
THE FLIGHT INSTRUCTOR WAS DEMONSTRATING A POWER OFF 180 TO HIS STUDENT AT MONTGOMERY-GIBBS EXECUTIVE AIRPORT. DURING THE LANDING ROLLOUT, THE INSTRUCTOR WAS UNABLE TO STOP THE AIRCRAFT BEFORE REACHING THE END OF THE RUNWAY. TO PREVENT GOING OFF THE RUNWAY EDGE, THE INSTRUCTOR MADE A HIGH SPEED LEFT TURN ONTO TAXIWAY F. THE AIRCRAFT SKIDDED IN THE TURN AND DESTROYED THE RUNWAY MARKING SIGN BEFORE COMING TO A STOP.