EE WAS REPLACING A 52"" BREAK OVER PULLEY. WHILE STANDING ON THE TOE-BOARD HE WAS REACHING FOR A CHIPPING HAMMER THAT WAS LYING ON THE BELT. HIS FOOT SLIPPED OFF TOE-BOARD CAUSING HIM TO FALL A GAINST THE INSIDE HANDRAIL, BRUISING HIS RIBS ONTHE RIGHT SIDE.