EMPLOYEE WAS HAULING 2 INCH PLASTIC PIPE TIED WITH A ROPE APPROXIMATELY 3 FEET FROM THE END. PIPE WAS IN A BIND AGAINST SIDE OF PETTIBONE, WHILE HE WAS HOLDING PIPE WITH RIGHT HAND LOWER THAN WHERE PIPE WAS TIED TO KEEP PIPE FROM SPRINGING BACK TOWARD FACE OR BODY. KNIFE CUT THROUGH ROPE EASIER THAN EXPECTED AND WENT DOWNWARD INTO THE RIGHT HAND REQUIRING 4 STITCHES.