UNINTENDED ACCELERATION WHILE SLOWING DOWN (ROLLING WITH MY FOOT FEATHERING THE BRAKE) TO PARK IN A STALL AT MY LOCAL POST OFFICE MY 2008 FORD FUSION INSTANTLY ACCELERATED JUMP THE CURB CROSSED THE SIDEWALK AND HIT THE BUILDING. THE CAR CONTINUED TO REV SPINNING THE FRONT WHEELS UNTIL I SHUT IT OFF WITH THE KEY. I VERIFIED THERE IS NOTHING BLOCKING THE PEDAL AND THE FLOOR MAT IS SECURE AND CLEAR OF THE ACCELERATOR. I HAD MY FOOT FULL HARD ON THE BRAKES AND WAS UNABLE TO STOP THE CAR. FORTUNATELY, NO ONE WAS HURT.