So you are saying she starts up the car and sits there waiting in a running car with the garage door closed? If so she was an idiot.
You'll notice from the photos, however, that it looks more like an explosion opened the doors.
She may well have just hopped in the car to get ready to travel and didn't actually intend to leave yet. Maybe she was taking some trash out. However, once she got into the seat and her purse with the special "turns on your car by remote" key was in the receiving range of the quite elaborate ignition system, the engine turned on anyway!
Don't any of you guys get around to see all the neat stuff the rich people got for their cars?