EE IS A BEAVER BOLTER OPERATOR IN PANEL, WHILE BOLTING ON THE 1/2 PAS SIDE OF 2 ROOM 18 X CURTAIN PANEL, EE NOTICED A CRACK IN SEAM. TRY TO BAR IT DOWN, PART OF IT CAME DOWN, DECIDED TO PUT BOLT IN IT, MOVED BOLTER UP, ROCK CAME DOWN STRIKING HIM ON THE RIGHT SIDE OF BODY.