TRAVELING WITH THE CRUISE CONTROL SET AT APPROXIMATELY 58 MPH, TRAFFIC 100 - 120 FEET IN FRONT OF THE VEHICLE CAME TO AN ABRUPT STOP. PRESSED THE BRAKE TO DISENGAGE THE CRUISE CONTROL AND STARTED APPLYING PRESSURE TO THE BRAKE PEDAL. THE VEHICLE SEEMED TO INITIALLY START TO SLOW, HOWEVER, AS WE APPROACHED THE STOPPED TRAFFIC, THE ENGINE CONTINUED TO REV AND WE COULD NOT STOP, CAUSING US TO HIT THE REAR-END OF THE VEHICLE IN FRONT OF US. THE VEHICLE WE HIT MOVED FORWARD A FEW FEET AND WE HIT THE REAR-END AGAIN AS THE EXPLORER'S ENGINE CONTINUED TO REV AND DRIVE US FORWARD EVEN WITH CONSTANT PRESSURE APPLIED TO THE BRAKE PEDAL. AFTER THE SECOND COLLISION, WE WERE ABLE TO PULL THE EXPLORER OFF TO THE SIDE OF A ROAD, NOTIFY THE POLICE, AND FILE A ACCIDENT REPORT. THE EXPLORER HAS NOT YET BEEN TAKEN TO THE DEALERSHIP TO EVALUATE WHAT HAD HAPPENED. *TR