Supernatural/paranormal stuff is very real. I've had a handful of inexplicable occurrences. Among them, once when I worked at a summer camp, the main cabin was the only place with Wi-Fi, and between 1AM-4AM was the only time in the night to get some solace from the campers. The main cabin was extremely old, and extremely rickety. Any movement within, or someone coming inside or out made a ton of noise. The cabin also had numerous musical instruments because we would do camp songs with the kiddos. Anyway, I went to the cabin for a midnight snack and solitude. I made absolutely sure that I was alone in the cabin because if anyone else were there I would go elsewhere on the campgrounds or to stargaze by the lake. The cabin was EMPTY, aside from me. As I was having a midnight snack,
I heard a cello play itself. No one was inside with me while I was in there, and no one came in or out while I was there (like I said, anyone coming in or out, or moving in any way would cause the cabin to creak very loudly) - but still I heard a few notes get plucked on the cello behind me. I play guitar and bass, so I went to investigate whether the notes I heard were open notes that could've resonated by something falling - the notes I heard could only be played by pressing down on the neck. I was shook, so I decided to gtfo.
Another time, I went to hang out with a friend whose family owned a massage parlor. She had keys to go in there after hours and we would go there occasionally after grabbing dinner. We were about to leave one night, and she asked me if I could check each room to make sure they were empty, and to turn off all the lights - I did. I checked all the rooms and made sure no one was there, and afterward, I turned off all the lights from the main switch at the back of the main hall. When I got back to the front reception desk, my friend told me she felt uneasy. A second after she says that to me, the door behind me forcefully flung open on its own and ALL of the lights were turned back on. She screamed and ran out. I was fascinated so I went to investigate, and again, all the rooms were EMPTY, but the lights I had just turned off had indeed been switched back on. The only entrance/exit to the parlor was from the front reception desk. I was more fascinated and intrigued than scared. Bewildered more than anything.
I've had others but this was already broaching TL;DR.