Jimmy heard Cage's words and suddenly understood. It seemed like after he killed the monster, the souls absorbed by it returned to Cage. This meant that the dissipating threads were actually the souls it absorbed. Besides the ones completely absorbed by the monster, some were not fully absorbed due to time or other reasons, and returned to their owners when the monster died.
Jimmy: "Are you sure?"
Cage nodded: "Yeah, I can feel it."
Jimmy: "Alright, I'll go find James now."
Even though it's already evening, Cage didn't let Jimmy go alone. Although the anesthesia used at the community hospital wasn't much, it could still affect Jimmy to some extent, so Cage wasn't assured.
When they arrived at the hospital and before entering the ward, they heard James's sobbing. Jimmy glanced through the window on the door and saw that Mary was already awake.
James had obviously just cried, as he was holding Mary's hand and speaking softly, with a trace of tears still in his voice.
