A PIECE OF ROCK FELL ~2"" X 14"" X 24"". IT FELL ~12' STRIKING THE EE ON THE BACK SIDE OF HIS LEFT KNEE, PUSHING HIM OUT INTO THE ROADWAY ONTO THE GROUND. *EE CAME BACK TO WORK 10-15-01. WENT FOR MRI ON 10-20. PENDING RESULTS WAITING FOR DR. TO READ MRI. EE DID NOT START MISSING WORK UNTIL 10-20-01. LIGHT DUTY FROM 10-15-01 TO 10-20-01. *DR. READ MRI. TOOK OUT OF WORK UNTIL SURGERY.