WHILE VAN WAS PARKED ON A FLAT SURFACE, WITH THE IGNITION OFF, GEAR IN PARK, VAN ROLLED BACKWARDS ABOUT 100 FEET, CRASHED THROUGH A FENCE AND HIT A MOBILE HOME BEFORING COMING TO A STOP. OWNER HAS BEEN EXPERIENCING PROBLEMS WITH KEY BEING STUCK IN IGNITION, AND KEY WAS STUCK AT THIS TIME. VAN IS BEING HELD BY DEALERSHIP. PLEASE PROVIDE FURTHER DETAILS. *AK