Strange things have happened around me most of my life, nothing really paranormal, just things falling over in empty rooms, hearing things and random stuff like that.
When I was staying at my parents for a bit, my sister and I were watching a movie in the living room. I was 20 or so and she was 15 or 16 (we're 24 and 19 now). I went into the dining room through to the kitchen to get a drink. From the kitchen you can see straight up the stairs and all the way down the hall (it's a split-level so there are only about 7 steps). As I was walking back through to the living room I glanced at the upstairs hallway and saw our youngest sister (who would've been about 10 years old) wearing a white nightgown, walk out of the bathroom at the top of the stairs and then down the hall to our parents room at the end of the hallway.
She ended up in their room most nights so I didn't think anything of it, until the movie was over and we went up to the bedroom my sisters shared and our younger sister was passed out on her bed still dressed in the jeans & t shirt she had worn that day. I told my other sister what I had seen and needless to say we didn't get any sleep that night. I still don't know who I saw.