The commonality they may all share could be: The Time Rules!
Though Colin could not accurately describe what he was feeling differently at this moment.
But with this reminder, Catherine Carter suddenly realized something and said in a deep voice, "Leonard, your hair has turned whiter."
Leonard's gaze narrowed a bit upon hearing this.
He finally realized where the danger of this ghost train lay.
"Neutral" was correct, but if there really was an issue with the flow of time, they could be trapped to death on the train without doing anything.
But that was the tricky part.
Even if they knew there was a problem with the flow of time, they could do nothing about it.
...
Catherine Carter did not lower her voice when she said this, so the other hunters also heard it.
The pioneer hunters who came for the bounty weren't as mentally prepared as Leonard and his three companions.
Upon hearing that there might be a problem with the flow of time, they all started to panic!