What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Student pilot had completed 3 landings with his flight instructor, then instructor released him on his first solo flight. On rollout of first landing, ATC instructed pilot to exit on kilo taxiway. Pilot was still slowing when he complied with ATC instruction. This caused a wide turn and caused the left-hand main gear to depart into the grass, striking a runway light. No damage to the aircraft. Runway light was damaged.
As the FAA filed it
STUDENT PILOT HAD COMPLETED 3 LANDINGS WITH HIS FLIGHT INSTRUCTOR, THEN INSTRUCTOR RELEASED HIM ON HIS FIRST SOLO FLIGHT. ON ROLLOUT OF FIRST LANDING, ATC INSTRUCTED PILOT TO EXIT ON KILO TAXIWAY. PILOT WAS STILL SLOWING WHEN HE COMPLIED WITH ATC INSTRUCTION. THIS CAUSED A WIDE TURN AND CAUSED THE LEFT-HAND MAIN GEAR TO DEPART INTO THE GRASS, STRIKING A RUNWAY LIGHT. NO DAMAGE TO THE AIRCRAFT. RUNWAY LIGHT WAS DAMAGED.