Noises
Once Christopher had noticed these stagnated water puddles, he began hearing noises coming from deeper in the tunnel. He thought that someone or something may be in the funnel and wanted to see if his theory was true. He continued walking deeper into the funnel to find out.
No Light or Warmth
Christopher began moving further into the tunnel to confirm where the noise source was coming from. While walking, he soon realized that there wasn’t any air movement, light, or warmth. The noise grew even louder as he came closer to the tunnel’s end.