WE WERE DRIVING NORTH BOUND ON 395 ABOUT 30 MILES SOUTH OF RITZVILLE, AT 3:30 ON SATURDAY, MAY 5TH. CLEAR SKIES, CLEAR ROAD CONDITIONS. SPARSE TRAFFIC, WE WERE IN THE OUTER MOST LANE. KIDS WERE QUIETLY WATCHING DVD IN BACKSEAT, WIFE AND I WERE CASUALLY TALKING. NO MUSIC ON, NO CELLPHONES, NO DISTRACTIONS. ALL OF A SUDDEN, WE HERD A THUNK AND THE REAR TIRES LOCKED UP. I IMMEDIATELY TOOK MY FOOT OFF THE GAS AND DROPPED THE CLUTCH (MANUAL TRANSMISSION), HOWEVER THE CAR WAS UNRESPONSIVE. ESSENTIALLY IT WAS AS IF I HAD SLAMMED ON THE BREAKS. AFTER A SECOND OF SKIDDING, WE STARTED A SLOW SPIN TO THE LEFT, CROSSING THE 'FAST' LANE. WE ENDED UP DOING A 360, THEN HIT THE SHOULDER AND THE CAR IMMEDIATELY ROLLED, FINALLY LANDING DRIVER SIDE DOWN. SOMETHING ON THE PATHFINDER MALFUNCTIONED AND CAUSED THIS PROBLEM. I AM HOPING THIS IS AN ISOLATED INCIDENT, BUT WOULD LIKE TO REPORT IT IN CASE THIS IS A MUCH BIGGER ISSUE. *TR