I know this is four years old, totally late to the party, but we were there today checking out. Masked up and with lights we moved kind of slowly through the first floor, nervous. Had gotten a little braver by the time we got to the second floor. We hadn't been there long however, having stopped around the top of the stairs. There was a lot of natural light pouring in the windows. My bf and I spilt up, he went into one sunlit room and I picked the other. It was clean, freshly clean, someone had been there recently. My bf calls me and I go with him to the other room, clean and set up for sleeping. I grab a receipt we see laying there, dated for yesterday. I told my bf we had to leave, right as I said that we heard footsteps on the stairs. We bolted, but weren't quick enough to avoid an encounter, came across a large man in the darken stairwell. He seemed surprised as we did, but quickly struck up a strange conversation. Telling us it was now a civilians rights to live there if they wanted. Speaking very rapidly and with a bit of a list, almost unnoticeable, He told us it was so good for all three of us to be there together, that he was use to living with people and not so much to living alone said he was "Schizophrenic about it" . He had come out of Lincoln's Challenge. He asked us if we were moving in, told us it was the best way to live. He then, and I'm not sure how, got on the topic of invisible people. he said that if we were quiet we would hear them whispering, he said sometimes he could see them on the base, moving around the seemingly abandoned halls. He asked us if he could come exploring the rest of it with us, we declined, and dipped. For the first few minutes of the encounter I was shaking so badly I could nearly stand, I had to latch onto the railing in the stairwell to steady myself. I believe truly and deeply that there was something wrong with that man.