What happens in Chapter 6, The Troop by nick cutter?

Tim goes into the boys’ bunk room to tell them to stay inside, explaining the situation. Kent suggests calling the mainland. Tim explains he has already decided to do that. Heading back into the main part of the cabin, Tim goes to use the radio only to have the man smash it to pieces. Tim and the man grapple, but the man coughs up algae and relents. The boys try to rush out, but Tim tells them to stay in their room. He moves the man to an old couch. Tim administers doxylamine to normalize the man’s breathing, and realizes he has done something very wrong by bringing the man into the cabin. Tim stays up most of the night.