EMPLOYEE WAS GRINDING IN CAM BORE PRIOR TO WELD BUILD UP. EMPLOYEE WAS SITTING WITH RIGHT LEG TUCKED UNDER LEFT LEG. THE GRINDER CAUGHT THE EDGEOF A DOWEL HOLE AND THE GRINDER KICKED INTO RIGH T KNEE WHILE STILL SPINNING AND CAUSED A 2 CM ABRASION CUT REQUIRING 4 STITCHES.