SUPERVISOR'S FOOT SLIPPED OFF THE THROW HANDLE OF A TRACK SWITCH AND HE HURT HIS BACK. CAUSE OF THIS INJURY WAS LACK OF SAFETY AWARNESS. COMPLIANCE WITH RULES/REGS WAS NOT A FACTOR, PROTECTIVE EQUIP. NOT A FACTOR, MINING EQUIP/SYSTEMS NOT A FACTOR, MINER ATTITUDE A FACTOR. EE WORKED AFTER INCIDENT AND DID NOT START TO MISS WORK UNTIL 8/19/03.