It settles something in Arthur's chest more than he can describe when he actually hears Charlie's voice, and an actual link is established between the human voice he's so dependent on and the body they're hauling.

That being said, he still catches the hat when Charlie drops it, and stuffs it immediately back onto his head. "Don't you fucking dare, Charlie."

He looks back up at John, and the concern is raw on his face. "John, this is bad, he's been out here too long. I-I'll explain later, just- get him to the hall, as fast as you can, I'll catch up."