This happened few years ago when I was about 20 years old. I was doing my undergraduate studies in a prestigious university. The university was situated in a huge garden like land where the buildings were very old and there were huge and old trees all over the land and it looked like the university was situated in a forest.
I had to stay in a female student hostel because my home town was far away from the university. The hostel was situated on the same university land surrounded with an overgrown garden. In our hostel 2 students must share a room. So I was sharing my room with a friend. It was my 2nd year at the hostel. Usually the lectures are over around 6.00 in the evening and all the students go home or go to their hostels after that. After 7.30 pm nobody is allowed to go outside the hostel and the security locks the gates of the hostel.
On that day me and my roommate came to our room at the hostel and we had our dinner there and started studying because the next day we were going to sit for a paper. It was about 8.30 in the evening and l guess most of the students were studying because the whole building was very silent. It was a 4 story building and we were in the 3rd floor.
Suddenly we heard someone screaming outside the hostel. It was a voice of a girl and it followed with a fading cry. It lasted for about 20 seconds and after that we didn't hear anything. So all the girls at the hostel were scared and we could hear the doors unlock and the students gathered in the hall at the 1st floor. Everyone had heard the screaming including the security people at the hostel gate. So we informed the main security of the university and they all gathered and searched all over the overgrown garden of the hostel and even in the whole land of the university. Meantime we had to gather all the girls and see whether someone is missing. But nobody was missing and we were asked to go back to our rooms. But we couldn't sleep that night because that scream was in our heads all the time. At first what we thought was that someone is trapped in the garden and screaming for help. But since there was nobody we thought that it must be some kind of a spirit.
Few months after that incident I met one of my seniors who was staying at the hostel few years ago. We had a long talk about our seniors and the hostel management. I told her about the screaming. First She didn't say anything about it but then she told me that she had the same experience once when she was staying at the hostel. And She said that it was a spirit of a girl who died many years ago near the hostel. That girl was staying at the hostel and was going home for the vacation. She was standing near the bus halt waiting for the bus and met with an accident that instantly killed her. So she couldn't go home and her spirit is trapped near the hostel.
After listening to this, I felt sad for her. I can imagine how she was standing there happily and eagerly waiting to go home to see her parents and relatives. Can't we help her spirit somehow.