MY 2004 CAD. SRX SHOWED A LEFT REAR FLAT TIRE. I PULLED THE VEHICLE TO A LEVEL, ASPHALTED, SCENIC OVERLOOK AREA, 23 MILES FROM PAGE, AZ. I COULD NOT GET THE SHIFTER FROM DRIVE INTO PARK GEAR, NOR WOULD THE KEY TURN OR RELEASE FROM THE IGNITION. I GOT OUT TO CHECK AND CHANGE TIRE, SPARE WOULD NOT RELEASE, EITHER. I CALLED ON-STAR, GAVE EMERGENCY DETAILS, TO FIRST ADVISOR, THEN ADVANCE DIAGNOSTICS. I GOT OUT OF CAR, IT SURGED, BACKWARDS, WITH THE EMERGENCY BRAKE, COMPLETELY ON, AND IT ACCELERATED, TAKING ME WITH IT, I PUSHED AWAY, AND IT KEPT ACCELERATING OVER THE SCENIC OVERLOOK, BEING DESTROYED. ON-STAR NEVER CONTACTED THE POLICE, AMBULANCE, OR ME, EVEN 1 WEEK AFTER THE ACCIDENT, I HAD TO CALL THEM AND REQUEST THE AUDIO OR TRANSCRIPT OF THE MALFUNCTIONS, AND CRASH. *NM