I wake up, head pounding. A curt voice echoes through the room: "With immediate effect, free movement on the train is forbidden. We've been spotted again." I stand up and gather my bearings. I'm on a train, there's a very ominous red glow permeating through the room, and the window is obscured by a mass of slithering tentacles, so close that I can make out each individual sucker as they writhe.