CAR PARKED IN GARAGE, IN GEAR WITH EMERGENCY BRAKE ENGAGED. WHILE UNATTENDED, CAR ROLLED DOWN 200 FOOT STEEPLY SLOPED DRIVEWAY, MISSING OTHER PARKED CAR, KNOCKING DOWN TREE AND ROLLING INTO DRAINAGE DITCH THIS SIDE AND THEN THE OTHER SIDE OF STREET. NO ONE STRUCK, INJURED OR KILLED, BUT DAUGHTER AND BABY COMING HOME JUST MISSED BEING HIT. EXTENSIVE BODY DAMAGE REQUIRING MINIMUM OF 3 SEPARATE TRIPS TO AUTO BODY SHOP. CAR IS STILL NOT PROPERLY ALIGNED AND CONVERTIBLE ROOF NEEDS MORE WORK. CONCERNED ABOUT RECENTLY ANNOUNCED MUSTANG RECALL FOR PARKING BRAKE FAILURES AND SAFETY OF CONTINUING TO DRIVE AND PARK THIS CAR.*AK