I was probably 11 or 12, and never really had any belief in the supernatural, aliens, etc. Around roughly 5am I was sleeping on my bottom bunk at the end of our hallway when a shadow figure about the height of my dad was standing in the doorway — not doing anything, just standing. I could hear my grandmother (who watched us at the time) in the basement, and I could vaguely remember my dad leaving about an hour earlier. I closed my eyes twice, opened them, and just stared with a squint so it looked like I was sleeping.
Eventually I was so scared I just closed my eyes and secretly hoped it was all some weird dream. I couldn't sleep, but soon after I heard dresser drawers slamming VERY loud in our spare bedroom. All of the sudden my grandma runs upstairs and tells me to quit making so much noise. I tell her what's up, she opens the spare bedroom door and there's nothing there. No possible way to escape either — a second-story window with the screen still in tact.