Jimmy focuses on keeping the light on the path in front of them.

Later he would not be able to pin down the exact moment that the echo started. He only knew that he had been glancing at the tunnel walls when all of a sudden he felt the all too familiar feeling of an echo, and he was remembering the walls of a very different underground tunnel. He remembered flashes of light playing across the walls of a natural cave, frightened small children, the sight of three men and a body in the shadows across the cave. And worst of all the sound of gunshots and the feeling of being shot through his stomach.

He staggers to the side of the tunnel, his face pale even in the dim light.