SUPERVISOR WAS TROUBLE SHOOTING ELECTRICAL PROBLEM ON #67 SHIELD & ATTEMPTING TO SEE IF THE ADVANCE LIGHTS WERE COMING ON. HE WAS LOOKING AT THE ADVANCE LIGHTS & INADVERTENTLY PLACED HIS FOOT UNDER THE PONTOON. CAUSE OF THIS INJURY WAS AWARENESS, COMPLIANCE WITH RULES/REGS NOT A FACTOR, MINER PROFICIENCY A FACTOR, MINING EQUIP A FACTOR, PROTECTIVE EQUIPMENT OK.