Years ago we were asked to look after the house of friends in the same street as us, as they were going away for a week.
We had known them for years, and obviously had visited them hundreds of times over that time. Their house felt normal- I am usually very sensitive to "presences." I could not feel anything bad although both my mother and I sensed an entity at times. We have a long history of spiritual and other paranormal experiences.
They left on the Sunday morning and that evening we went to switch on lights, close curtains and so on. From the time we stepped into the house, the atmosphere was heavy and felt very oppressive.
As we moved around the lounge and dining room, closing curtains, we felt as though there was a hostile presence there, watching us. This grew even worse when we moved to walk down the passage. This is where we both felt the presence before.
To make it worse, there was a photo of the grandfather on the wall, and he seemed to be staring right though you. Walking down the passage was like walking through a thick oil field. To put some perspective to this, as I mentioned, we come from a family who have many psychic experiences and we are not afraid of spirits. Both my mom and I were afraid of this entity. It was bad and it felt like it wanted to harm us.
We did what we needed to, and left as quickly as we could. As soon as we stepped out of the house, it felt like we were free.
This happened the second day as well, when I went to open the curtains. That was the Monday. That evening again we braved the darkness we both felt as we closed things up. It was mid-summer, but the house was cold. The sun was also still shining outside, yet it "seemed" so dark within the walls.
We decided that from then on to leave the curtains in the bedroom closed and the lights on. This way, we did not have to brave the passage.
Then, on the Thursday evening, when we were closing the curtains in the lounge and dining room (when you pass between them, you can see down the passage into the main bedroom) both of us saw a shadow figure move from the end of the passage into the main bedroom.
They arrived back on the Saturday and for years, until they moved, we avoided visiting.
Now I am doing Ghost Investigations. The present owners will not discuss the house or allow my team and I in to investigate.