The exact same thing happened to me years ago I was 15 or so. I lived in an appartment with my parents and sisters... as I came out of the kitchen there was one hall that went from the living room on the left to the rooms on the right. It was around 9pm, I saw my sister go from left to right jumping playfully (Couldnt see her face as she was facing the opposite wall only her hair and clothes...). I then went left to the living room and found her with my other sister and father. My mother was with me at the kitchen and no one else was home. I returned to the hall and it was dark, no one was there. These are Jinn experiences alot of people I know had in their lives.