THE VEHICLE IN QUESTION, 2005 TOYOTA TACOMA , CONTINUED TO ACCELERATE AFTER RELEASING THE ACCELERATOR PEDAL. I REPEATEDLY DEPRESSED THE BRAKE PEDAL TO NO AVAIL AS THE VEHICLE RAMMED INTO A CHAIN LINK FENCE. THE FENCE SLOWED THE MOMENTUM OF THE VEHICLE AS VEHICLE ACCELERATION CONTINUED. I THEN COMPLETELY REMOVE MY FOOT UP FROM THE BRAKE AND HIT THE BRAKE VERY HARD AT LEAST TWO TO THREE TIMES UNTIL THE ACCELERATOR FINALLY BROKE LOOSE AND ACCELERATION STOPPED. THE VEHICLE DID NOT SHOW ANY SIGN OF A PROBLEM PRIOR TO THE ACCELERATOR HANGING UP. IT JUST OCCURRED RANDOMLY.