WHILE PULLING IN TO PARK IN THE LOT AT A LOW SPEED- 5 MPH OR LESS- I TOOK MY FOOT OFF THE GAS TO APPLY THE BRAKE AND THE VEHICLE ACCELERATED AND HIT THE SIDE OF THE BUILDING. THE (TIN) BUILDING WAS DENTED AND MY CAR WAS SCRATCHED ON THE BUMPER- BELOW THE GRILL AND ALSO THE SUBARU EMBLEM WAS CRACKED.