EE WAS CUTTING #1 ENTRY AT THE TIME OF THE INCIDENT. HE HAD CUT HIS FIRST CUT ON THE RIGHT SIDE & WAS IN THE PROCESS OF SETTING OVER TO MAKE HISSECOND CUT. A ROCK MEASURING 58"" X 24"" X 7""TO 0"" THICK FELL FROM THE ROOF FROM BETWEEN ROOF BOLTSSTRIKING THE TOP OF HIS HARD HAT & KNOCKING HIM DOWN. THE RESULT OF THIS INCIDENT WAS A COMPRESSION FRACTURE OF A VERTEBRAE IN HIS LOWER BACK.