When I was little I heard voices and thumps in an old house I used to live in coming from the second floor. I went up to investigate and nothing was there. It was very frightening. In that same house I had a very weird experience in my bedroom which was also on the second floor. In the middle of the night, I woke up and went into a large closet in my bedroom. I removed a panel on the wall and climbed through a hole into a large white room. In the center of the room there was a child's play kitchen / stove toy. I played with it for a bit. I can't remember what happened after that. I woke up in my bed and then went to investigate the closet. The entrance to the room had been sealed up. If you were to look at the exterior of the house, there wasn't any structure beyond the wall of that closet. I wonder now if aliens or beings from another dimension were experimenting on me.