Crawley tells me where to take a turn off to the left into yet another narrow tunnel. The tunnel looks too narrow to be part of the train system. Perhaps it is a siding or a maintenance tunnel, I can’t say for sure. The tunnel ends at a heavy steel door set into the wall. A wheel is set in the middle of the door to open it, like an old-fashioned airlock of some sort. Crawley steps up to it, keeping the gun trained on me, and I consider running. I might be able to bolt down the short tunnel and around the corner before the ghoul can get a shot off.