I was in the third grade, so I had to have been nine when this happened.
My mom's (now ex) husbands mother was staying with us for a visit and I had to share my room. I was sleeping on the top bunk and she was sleeping on the bottom. I remember it being a long day so I fell asleep fairly quickly but woke up a few hours later. It wasn't anything important that woke me up; I just had to use the bathroom or get a drink. I climbed down the ladder of the bunk bed and opened to door, only to find a HUGE black figure inches away from me. I only kept the door open for a second but that second was all I needed to see that it nearly touched the ceiling (the ceiling wasn't that high but if anybody could reach it like that, they had to have been giant) and so wide that even if I wanted to (which I no longer did at this point) I couldn't have left the room.
I slammed the door and screamed, waking up my mom's husband's mother. She tried to calm me down but I couldn't stop crying. I never told her what I saw for some reason. I just eventually calmed down and went back up to my bed without doing what I had gotten up to do in the first place.
I'm fairly certain, not that I'm older that what I saw was just a shadow person, and nothing more. But I thought I'd share it because it was one of my first experiences.