EMPLOYEE WAS REMOVING THE BOLTS FROM A PIPE CLAMP ON THE END OF A SECTION OF 1 1/2"" HEAVY WALL PIPE. AS HE REMOVED THE LAST BOLT, THE END OF THE PIPE HE WAS HOLDING IN HIS RIGHT HAND FELL, CAU SING HIS FINGER TO BE PINCHED BETWEEN THE PIPE CLAMP AND THE TOP PLATE OF A 4"" PIPE.