My friend assured me the flat he lived in was haunted, specifically his apartment. I personally got to witness that with random doors slaming shut when there were no windows open and no wind. But we ignored all of that mostly. One night somewhat after 2am, my best friend that lives there, one other friend and me were leaving the apartment to go hang outside. When you exit the entrance door, there is a long hallway and at the end there is an elevator. We stood by the elevator and waited for it to come to our floor, we were laughing quietly because it was late and talking about random stuff and at the end of the hallway in front of her home's door I saw a ghostly figure that looked somewhat gray and transparent and like a woman in a dress, I thought I was seeing things and didn't say anything but immediately my friend exclaimed with fear in her voice "What the f* is that" and my heart stopped and I said "Wait you saw that too" and the third friend (my bestie) exclaimed "I thought I was crazy, both of you saw that??" It all happened very quickly and we were terrified and run out of the building screaming. While outside we commented about what we saw and we all saw the same thing, a ghostly figure. My bestie didn't want to go home alone later.