AFTER HOLED DRILLED, DRILLER FORGOT TOREMOVE RUBBER DUST COVER FROM ROD; LOOKED UP TO WATCH HEAD OF DRILL & SWING ROD INTO CAROUSEL. AS HE LOOKED UP THE FALLING RUBBER COVER STRUCK HIM THE FAC E KNOCKING OFF HIS SAFETY GLASSES & HARD HAT. HEWAS TAKEN BY CO. VEHICLE FOR EMERGENCY CAREA; WAS RELEASED WITH NO BROKEN BONES; NO STITCHES; NO CONCUSSION. WAS TOLD BY ATTENDING PHYSICIAN HE