MOVING RADIAL STACKER TO DIFFERENT LOCATION REQUIRES WHEELS MUST BE ROTATED. A CHAIN IS ATTACHED TO LIFT STACKER ON ONE SIDE SO WHEEL CAN BE ROTATED. AS THE STACKER WAS BEING LOWERED, EMPLOYEE HAD HOLD OF CHAIN TO DISENGAGE. THE STACKER STARTED TO ROLL SO CO-WORKER LIFTED STACKER CAUSING THE CHAIN TO TIGHTEN AND CATCH EMPLOYEE'S HAND BETWEEN CHAIN AND STACKER.