When watching a movie I feel more sorry when they kill a dog than when they kill other people as that's normal.
Anyway
1. who in hell would ever make a door without a normal lever on the inside like 99% of cars?
2. no glass breaking device in the car?
3. nobody notices an old man hammering at his windows?
Look a few post's above you, there IS a lever to open the door, as Wazup pointed out it's about one foot from the button that is normally used and it is clearly marked "door open" with an imprint of a car with it's door open. although I feel badly that what was apparently a nice man and his dog perished it should have never happened. If you know that the car requires electric power to open the door and we all know that car batteries just croak sometimes without warning then it is IMPERATIVE you read the manual so you can deal with the situation if it happens.