WHEN I TRIED TO PARK MY 2011 ACADIA SLE, THE ACCELERATOR BECAME STUCK CAUSING THE FRONT OF MY CAR TO CRASH INTO A HEALTH CLUB WALL. WHEN I SAW PEOPLE RUNNING INSIDE THE HEALTH CLUB I THOUGHT I HAD ROLLED OVER SOMEONE. SO, I TRIED TO BACK UP AND WHEN I PUT THE CAR IN REVERSE IT SHOT BACKWARDS WITH A ROLLING FORCE AND HIT AN IRON POST. TO KEEP THE WHEELS FROM CONTINUOUSLY ROLLING, I HAD TO SLAM THE GEAR INTO PARK AND TURN THE IGNITION OFF. I BELIEVE THIS ACCIDENT SHOULD BE INVESTIGATED FURTHER BEFORE SOMEONE ELSE IS INJURED OR KILLED.