Some people like to go spelunking, i.e. cave exploring. The helmets with the lights on them. The ropes and harnesses. That's going into caves for fun, but imagine if you had to live in one. That'd include a sleeping bag on a hard floor. Drip-drip-dripping. Bats, maybe. And now imagine that you have to live in one because you are on the run for your life. That'd include fearfulness to be seen outside the cave. Missing the friends and family you used to see all the time.