TL*THE CONTACT OWNS A 2008 TOYOTA AVALON. WHILE DRIVING APPROXIMATELY 50 MPH, THE VEHICLE SPONTANEOUSLY BEGAN ACCELERATING ON ITS OWN. THE CONTACT DEPRESSED THE BRAKE PEDAL WITH MAXIMUM FORCE AND PLACED THE VEHICLE INTO NEUTRAL, BUT IT CONTINUED TO ACCELERATE TO 70 MPH. HE SMELLED A BURNING ODOR AND THE VEHICLE BEGAN DECELERATING. THERE WERE NO WARNING LIGHTS ILLUMINATED ON THE INSTRUMENT CONTROL PANEL AND THE CRUISE CONTROL WAS NOT ENGAGED. THE DEALER WAS UNABLE TO DUPLICATE THE FAILURE AND PROVIDE A REMEDY. THE VIN WAS UNKNOWN. THE FAILURE AND CURRENT MILEAGES WERE 11,000.