EE WAS REPALCING RUBBER SKIRTING ON OUTBY END OF TRANSFER. HE WAS CUSTOM FITTING CONTOUR OF BOTTOM OF BELT WITH RAZOR KNIFE. HE WAS CUTTING TO THE SIDE OF BODY AS EE WAS CUTTING CONTOUR KNIFE HAD ANGLE TOWARDS HIS LEFT KNEE, AND BLADE SLIPPED OUT OF BELTING. BLADE HAD ANGLE IN BELT WHILE CUTTING.