I WAS PARKING MY 09 FUSION AT MY SON'S PRESCHOOL, AND WAS ALMOST STOPPED IN THE SPOT, WHEN MY CAR VIOLENTLY AND UNEXPECTEDLY ACCELERATED FORWARD UP OVER A 4 INCH CURB. I PRESSED ON THE BRAKE AS HARD AS I COULD, BUT IT WAS THE TREE THAT I HIT THAT STOPPED ME. THERE WAS NO DAMAGE TO THE CAR, BUT I HAD BOTH MY CHILDREN (4 YEARS OLD AND 11 MONTHS OLD) IN THEIR CAR SEATS WITH ME AT THE TIME. THIS IS THE SECOND TIME IT HAS HAPPENED WHILE PARKING. BOTH TIMES I WAS GOING LESS THAT 10 MPH AND WAS ALMOST AT A COMPLETE STOP WHEN THE CAR UNEXPECTEDLY LURCHED FORWARD. WILL NOT PUT MY CHILDREN BACK IN THIS VEHICLE UNTIL THIS PROBLEM IS FIXED; IS NOT DRIVE-ABLE.