I WAS IN THE PROCESS OF PULLING INTO A PARKING SPACE WITH MY 2009 PONTIAC VIBE. I HAD MY FOOT ON THE BRAKE PEDAL , WITHIN A FOOT OF COMING TO A COMPLETE STOP, THE VEHICLE ACCELERATED SUDDENLY. THE SUDDEN ACCELERATION JERKED MY WIFE'S HEAD AND MY HEAD BACK. AS THE VEHICLE ACCELERATED I PRESSED DOWN ON THE BRAKE PEDAL AS HARD AS I COULD. THE VIBE CAME TO A STOP ON TOP OF A SNOW BANK AND DAMAGE WAS DONE TO THE FRONT OF THE VIBE. THIS WAS THE FIRST TIME THE VEHICLE DID THIS. THE SECOND TIME WAS ALSO IN A PAVED PARKING LOT. I WAS PULLING INTO A PARKING SPOT, I HAD MY FOOT ON THE BRAKE AND JUST BEFORE I WANTED TO STOP THE VIBE ACCELERATED SUDDENLY, BUT, NOT AS HARD AS THE FIRST TIME. I DEPRESSED THE BRAKE AS HARD AS I COULD TO STOP THE VIBE. THE VEHICLE DID NOT HIT ANYTHING THIS TIME. THIS HAPPENED ON FEB. 13, 2010. NO ONE WAS INJURED IN EITHER OF THE OCCURRENCES. *TR