EE WAS HOOKING UP CHAIN TO MOVE POWER CENTER. ANOTHER EE WAS OPERATING SCOOP. FLOOR OF MINE WAS ON SLIGHT INCLINE AND SCOOP WAS COASTING BACK TOWARDS POWER CENTER. EE WAS TO SIDE OF POWER CENT ER. SCOOP STOPPED ROLLING. EE STEPPED INTO HOOK CHAIN. SCOOP JUMPED IN TRAM AND HIT HIS LEG AND KNEE ON RIGHT SIDE.