DT*:THE CONTACT STATED WHILE DRIVING ON AN INTERSTATE HIGHWAY AT 70MPH, THERE WAS STINGING/BURNING SENSATION TO THE CONTACT'S FOOT. WHEN THE FOOT WAS REMOVED FROM THE GAS PEDAL, A STEAMING LIQUID WAS OBSERVED ON THE FOOT AND ON THE FLOOR AROUND THE PEDALS. THE LIQUID WAS SPEWING FROM AN AREA UNDER DASHBOARD ABOVE THE GAS, BREAK AND CLUTCH PEDALS. STEAM/VAPOR ALSO APPEARED TO BE COMING OUT OF THE DEFROSTER VENTS ON THE DASHBOARD. THE ACCESSORIES WERE IMMEDIATELY TURNED OFF AND THE VEHICLE WAS MOVED OVER AND OFF THE ROAD. THE HOT LIQUID CONTINUED TO SPEW AND BURN THE CONTACT'S FOOT AS THE BRAKES WERE BEING APPLIED. THE VAPOR OF THE LIQUID FILLED THE VEHICLE INTERFERRING WITH THE CONTACT'S VISION.