He was struggling to get home on a freezing winter afternoon. The roads were closed because of the unexpected heavy snowfall so he had to walk home from work. Taking his usual path by the woods, he was surprised to see a dog out in the cold.
Source: Past Pedia
He let the dog walk with him. Suddenly, the dog stopped in its tracks and started barking angrily at a bush ahead of them. Then, he realized what the dog was barking at. He wanted to run away but his feet were frozen in place out of shock.