Noises and the such...

Hello, I'm new to this forum so sorry if this isn't the right place for this, but still...
I work in a shop where it's reported that a man was killed on the third floor, which only a handful of people know about...
I can't remember what year he was killed, but occasionally, I will see a guy, sometimes in a suit, sometimes in just a shirt and a normal pair of trousers, but only for a second or two, then he's gone, and he's always a little blurry, but everything else in my vision is clear...
While i'm working through the night on my own, I will hear noises, and sometimes when with someone else at night there I will hear shouting, and when I ask my co-worker he says it wasn't him... And I believe him... wth is going on ;.; I don't want to believe it's ghosts, but i'm not diagnosed with anything like anxiety...

Well paranormal is a little out of our wheelhouse....

You speak of working thru the night on your own, are you speaking of working all night? I used to work nights in a large building after closing hours and would sometimes see movement out of the corner of my eye, or think I saw people for a moment at a time, or hear noises. Your mind plays tricks on you, especially if you're dwelling on something, and also if I'm not mistaken I believe there is a phenomenon where late night workers by themselves do think they see people and such, it's a psychological thing that's been documented and supposedly there's not really anyone there. In our case we weren't worried about anything supernatural, just that there might be flesh-and-blood people hiding out/sleeping in there when they weren't supposed to be in there.