Eternal Darkness

You board the last train of the day, heading to the end of the line. You are exhausted. You quickly fall into a deep sleep. When you wake up, you realize you are the only one left on the train. You have no idea how long you've been asleep, but the train is still moving, even though it should have reached the end station by now. There are no streetlights or any form of illumination outside the window, and it feels like the train is traveling through a pitch-black tunnel.