She took the dust and brightened back up again. Thorin hadn't realized how much she had...dimmed...until he saw her back to normal. He didn't think it was supernatural, either. She just looked like a human who wasn't depressed anymore.
A sound drew his attention. It seemed to be coming from the direction they were headed. He breathed lightly and listened. He thought he heard it again, but Clo moved at the same time and the sound of her covered the distant sound.
"Shush," he said, extending his hand in half of a stop gesture. She looked sharply at him, but he kept looking forward and slightly down, straining to listen, not reacting to her.
It occurred to him that it was presumptuous to speak this way and that he could explain himself to resolve the tension. None of this showed on his face. He was still.
Clo relaxed her face and neck, abandoning her gaze. Something was happening. She made another small noise as she did so.
"Dammit, woman," he cursed her incompetence in his mind. That might have been an unfairly strong reaction, he thought.
"Well, then it's a good thing I didn't say -" his ears alerted him. The sound came again. He was now moderately certain he had heard it a second time already when Clo was moving. It sounded the same. Like a great burlap bag full of soup falling hard onto pavement.
He looked at Clo, and she looked back, very still. Something was happening. The sound came a fourth time, and Clo's lips tightened. She stood up straight and looked into the distance.
Thorin followed her gaze. They saw it together, not looking at each other when they did.
It was like a floating pair of lungs, was the first thought that came to mind. They were a little ways off and coming closer. The sound occurred as they floated away from each other, empty space hanging between them, and then slammed together again with an organic thump. Each thump was coming in time, like a very slow beat.
They had already been coming towards them, but Thorin thought he saw a subtle shift, as they began to move exactly in their direction.
He looked subtly at Clo and found her looking back at him. Their eyes met and Thorin felt his body tighten. Now what?
Silence reigned for slightly too long, and Thorin started as he realized it. He whipped his eyes back to the lungs and saw them farther apart than before, and moving farther away still. They were coming faster as well. They stopped separating and maintained a constant distance between them of about 20 feet, "running" towards Thorin and Clo, each half cutting off one side of retreat.
"It's a flanking maneuver," Thorin said quickly. He took one step back, facing Clo now, but keeping his eyes on the lungs.
"Clo?" he said, his voice rising nervously.