WHILE STOPPED AT A STOP LIGHT BEHIND OTHER VEHICLES, MY VEHICLE SUDDENLY ACCELERATED PUSHING ME INTO THE VEHICLE IN FRONT OF MINE. APPLYING FULL PRESSURE WITH BOTH FEET ON THE BRAKE PEDAL, MY VEHICLE CONTINUED TO LURCH FORWARD INTO THE VEHICLE IN FRONT OF ME AND PUSHING IT INTO ANOTHER VEHICLE. I HAD TO PUT MY CAR INTO PARK AND SHUT OFF THE ENGINE TO GET IT TO STOP LURCHING FORWARD. IT MUST HAVE LURCHED FORWARD 3 OR 4 TIMES INTO THE TRUCK IN FRONT OF ME AFTER MAKING INITIAL HIT. WE'VE NOTICED WHERE THE IDLE WOULD INCREASE IN THE PAST BUT NOTHING THAT SEEMED TO BE DANGEROUS IN ANY WAY. WE HAD A 98 EXPIDITION THAT WOULD INCREASE IN RPM'S AND LURCH FORWARD AND HAD TO TAKE IT TO THE DEALER FOR REPAIR. THAT DRIVER IN THE TRUCK IN FRONT OF ME COMPLAINED OF NECK PROBLEMS AND HAD TO BE TAKEN IN AN AMBULANCE. *AK