Surprise stories

Sometimes I sit down and write. I don't think about it, I don't even really make stuff up, I just write. It's like there's this story or poem in my head and all I have to do is write it down. Like there's this narrator and all I have to do is put the narrative on paper. Once that's done, more often than not, I give the file some redundant name and close it, because I'll usually be late for whatever I should've been doing in the time that I just spend typing out this story or poem. Then I forget about it.

You read that correctly: I forget about it. Once in a while, I have this thing where I click random files in my writing or poetry folder and just read and let myself be surprised. I'll often have only the vaguest recollection of writing it. It's undoubtedly mine. My style of writing, my signature, my particular brand of spelling errors. More often than not, it's even pretty good. But it's like it was in my head, needed out and once it was out it was done and okay to forget about. All these forgotten stories and poems have three hallmarks:

1. They are all first person and, stemming from that, usually flow of consciousness writing. When I consciously write, I always write third person.
2. They all have a certain flow in the writing that is nearly lyrical, even the prose.
3. They don't cover my usual subject matter

So does anyone else recognize this? Is this what people talk about when they talk about muses or 'divine inspiration'? Or am I just bonkers and dramatizing something that's really normal? Just curious.