Walking through a mirror

One time I tried to walk through a mirror because I'd read that you could use those as "doors" to other places. Well I tried stepping though one and I found myself in a corridor it what looked like an office environment. I remember seeing on a billboard a set of rules that had to be followed, such as #Appear in human shape, #Wear cloths, there were more but I can't remember.

I walked down the corridor and ended up in a bigger room, there was a guy sitting at a desk near where I entered and around the room there were people at this own desks writing on paper. I walked up to the guy at the desk and I asked where I was. He gave me this annoyed look of "are you stupid or something?" I said that this was the first time I went through a mirror and before I've only been lucid dreaming. He said "Oh, well then you have a body to go back to..Most people in here don't" When I processed what he'd said my jaw almost dropped, and I just said something like "Uh, okay" He again gave me a look like having made the decision of "Yup, he's stupid" but he told me move a long and I went to some of the people sitting at the desks.

I noticed that next to some people filling out forms there were things like bottles of alcohol and cigarettes etc. After speaking a bit with a guy he told me that he'd been drinking quite a lot and had fallen asleep with a lit cigarette. His house had burned down, and he along with it.

I talked with a few more people, but here's where the memory gets blurry and I can't remember much more after that. I'm not sure what to think about the experience and if there's anything to it... but it sure was an interesting experience.