So back in college a buddy and I subleased an apartment over the summer because our dorm was closed. The basic layout is that you walked in via the living room, with a hallway that headed toward the back. Off the hallway on one side was a galley kitchen with a narrow doorway (maybe an inch or two wider than my shoulders). A few steps forward on the other side was my roommate’s room, and my room was straight at the end of that hall.

One night I wake up hungry so head towards the kitchen. It’s pitch black, but for some reason my roommate slept with his door open so not being a dick I just walked down the hall in the dark (it was a straight shot and when I opened the fridge I knew the light would turn on so I’d be fine). I turn to walk into the kitchen and bumped into someone - you know that kind of soft/give when you walk into somebody. Assumed my roommate had gone into the kitchen for something and also wasn’t turning on the lights so said “Sorry dude” and flipped on the light switch right then (it was right next to my right hand - no delay between the bump and the light AT ALL). Except it wasn’t him (goddammit I’m getting goosebumps typing this right now).

There was no one there. Period. But there was also no way it was my roommate. Narrow doorway so he couldn’t get around without touching me, and the time between the bump and the light coming on was immediate. With the light now I turned around and could see my roommate through his door, sleeping in his bed peacefully.

There were other things that happened that summer to kind of indicate the place was haunted - things move around or go missing (but attributed that to forgetfulness or pranks), and sometimes pipes would be banging up until I’d ask the ghost to stop because I had class or whatnot in the morning (but there I figured I’d subconsciously gotten used to however long it took for it to stop on its own so it was coincidence).

But to this day I have NO viable explanation for who/what I bumped I to that night.