That is one very smart dog. He literally dragged his unconscious or barely-conscious owner to safety.
My first rescue Ibizan Hound Minny did the same or better.
My woodstove backed up and I was unconscious from the smoke that had filled the whole house.
I came to with her jumping up and down on my chest, barking in my face.
It was dog CPR.
If not for her, she, I and my other dogs would have simply died that night.
Good boy!