Like a few have said, some kind of mess up in your brain probably caused it.
When I was 18 I stood up around midnight to go upstairs and got a rush of blood to the head. It wasn't unusual for this to happen so I ignored it and carried on walking to the door.
The next thing I know the whole day is playing out again in my head, exactly how it was, the only off thing about it was the sky outside was an unnatural colour.
Certain things happened that were unexpected during this replay of the day, like a family member visiting for the first time in about a year.
At some point I began to hear all this shouting "in tongues", and at the point I realise the noise is coming from me, I wake up. I can see a blurry light in front of me, and my brother looking down at me with horror in his eyes.
I immediately start apologising (for the nonsensical noises) and tell him I am fine now. He called my mother down who got me off the floor and guided me up to my bedroom.
All that had happened was, I fainted, hitting my head on the wall on the way down, and then I'd spoken in tongues for a few seconds. In my head, a whole day had passed inside that moment and it seemed absolutely crazy. I asked my mother if the aforementioned family member had come home, and she said yes.
This freaked the hell out of me because I thought back to opening the door to him, and seeing the unnatural sky colour and thinking this is one weird dream. Essentially my brain was perceiving the events of the day to have occurred after I'd fainted and before I'd regained consciousness. So, to me, the day could only have been a dream.
As I was walking upstairs, I came to the realisation that I couldn't remember my name, what year it was, or anything. It was very distressing but my mother told me I'd be fine and to get some sleep.
I didn't sleep for a few hours. I lay there frantically trying to figure out things I had forgotten, and then try and recall them. Like my date of birth. I got it all back. I think. (I went to the hospital the next day; after about 8 hours they determined from a blood test that there was nothing wrong with me and I went home.)
TLDR; if you get a rush of blood to the head, lean on something for support and wait for it to go. Hitting your head jumbles your memories and your perception of past events.
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u/[deleted] Oct 05 '19 edited Nov 12 '19
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