Knock At The Door

You start to walk your dog outside. All of a sudden, your dog speeds up. He starts running and running. You try to call out his name for him to stop, but your dog is out of control! You don't want to let go, or your dog will run away. You've been running for a while and soon you realize that you don't know where you are. The dog is gaining speed, and hes going so fast, he starts dragging you! You're forced to let go of the leash. The dog keeps running.
You look around and see no one. All of the houses around are old and abandoned. You...