If you haven't got light underground, it doesn't really matter what else you have, does it?
What if you "sealed" swim goggles with Vasoline?
Would a Res-Q-me escape tool be useful for escape from a subway car?
"...if you leave the train without permission from the train crew, you stand a good chance of being arrested..." ("THANK GOD! I DEMAND that you arrest me and get me out of here!")
Do compasses work in subway tunnels (with the metal tracks)?
Do ham radios work underground?
Sue