Man's...or Woman's...best friend!

We were called to an MVA (motor vehicle accident) on a remote stretch of road.
An elderly woman had driven her car off the road and down an embankment into some trees.
A large tree had finished up lying across the roof of the car.
The driver was conscious but obviously in quite a bad way. She had bilateral fractures to her arms and legs and also chest pain. One of legs had an open fracture of her femur. The bone was protruding about 6cm. There was a lot of blood from a large laceration to her head.
We had called the fire brigade to help and due to the fact of the distance to the nearest hospital we also called our helicopter rescue.
We eventually extricated the patient onto our stretcher and she left in the helicopter.
It was then that a bystander came up and said that she was the one that had found the car.
She (the bystander) had been driving along the road when a small dog had run out in front of her. She was able to miss the dog without herself having an accident (this stretch of road has a 110kph sped limit). Instead of driving off, she noticed that the dog didn't 'look' right. When she went back to it, she realised that it was covered in blood.
She decided to have a look around and eventually found the wrecked car.
So dog's really are man's best friend. That dog almost certainly saved its owner's life. She probably wouldn't have been found for a long time due to where we were.
By the way...both dog and owner survived.