AS EE WAS ASSISTING HIGH SCALING FROM GROVE MAN LIFT, A SECTION OF ROCK FELL ON THE BOOM OF THE RIG EJECTING HIM OUT OF THE BASKET. FALL PROTECTION WAS BEING WORN. THE EE DID SUSTAIN HEAD LACERATIONS REQUIRING 6 SUTURES, MUSCLE STRAIN TO LOWER BACK AND LEFT KNEE, AND CONTUSION TO LEFT THIGH. EE WAS RELEASED FOR WORK ON 5-30-03 BUT HAD SPENT ALL DAY AT THE DR. OFFICE ON 5-29-03