INJURED WAS HELPING PULL TWO 1 1/4"" PLASTIC LINES OUT OF BORE HOLE. PLASTIC LINE WAS HOOKED TO FORKLIFT WITH 1/2"" STEEL CABLE, THE CABLE WAS RUN THRU TRI-POD OVER BORE HOLE. INJURED WAS STANDI NG IN LOOP OF SLACK IN 1/2"" STEEL CABLE. TRI PODTURNED OVER AND SLACK IN ROPE CAUGHT EE AROUND MID SECTION, DRAGGING HIM ABOUT 10 FT.