WHILE DRIVING AT 80 MPH AND ATTEMPTING TO PASS ANOTHER VEHICLE THROTTLE STUCK OPEN. CONSUMER DEPRESSED THE BRAKES, BUT THERE WAS NO RESPONSE. ALSO, EMERGENCY BRAKES FAILED TO RESPOND AS WELL. TO AVOID A COLLISION WITH ANOTHER VEHICLE CONSUMER DETOURED INTO A DRY RIVER BED. VEHICLE FINALLY STOPPED ON ITS TOP AGAINST A FENCE.*AK