New York’s subway stations are a subterranean maze of dank spaces with no relief from the heat when the trains are delayed. The heat doesn’t even let up at night. It actually feels like it’s trapped down there with you.
The heat is enough to drive anyone a little crazy. Imagine what it does to people who are already crazy…people who may just happen to cross paths with you in an empty subway station at night.
Also, when you are in the subway, you are below the level at which bodies are buried, six feet underground. I’m sure that does something to the mind’s of people who think they see ghosts, too.