EE REMOVED A PLATE COVERING A 2'X 2'OPENING IN THE FLOOR GRATING TO LOWER A GEAR BOX SHAFT THROUGH. THE POWER CABLE TO THE CRANE WAS NOT RETRACTING PROPERLY SO EE MOVED TO CORRECT THE CABLE & TURNED AROUND & STEPPED INTO THE OPENING HE CREATED. HIS RT. LEG WENT INTO THE OPENING CAUSING A CUT ON THE FRONT SIDE OF LOWER LEG, 20 STITCHES.