I WAS DRIVING ON A 4 LANE ROAD WITH A MEDIAN (NOT HIGHWAY). I WAS IN THE LEFT LANE PASSING 2 OTHER VEHICLES WHEN MY EXPLORER BEGAN TO ACCELERATE AND WOULD NOT STOP. THE ROAD WAS WET AND AS I BEGAN STOMPING ON AND OFF THE GAS PEDAL TO TRY AND RELEASE THE ACCELERATOR, THE VEHICLE BEGAN TO HYDRO PLANE. I WENT ACROSS THE RIGHT LANE AND HIT THE CURB, WHICH PRETTY MUCH RIPPED OUT THE FRONT UNDERCARRIAGE OF THE VEHICLE. ONCE I LEFT THE ROADWAY AND COULD NOT REGAIN CONTROL OF THE VEHICLE I PUT THE TRANSMISSION IN NEUTRAL UNTIL I COULD GET THE CAR STOPPED. ONCE THE VEHICLE CAME TO THE REST I TRIED AGAIN TO STOMP ON THE ACCELERATOR TO GET IT TO STOP ACCELERATING BUT HAD NO RESPONSE. THE VEHICLE DID NOT STOP ACCELERATING UNTIL I TURNED OFF THE KEY.