Have you ever found something on the Internet that you wrote somewhere else?

[Spooky Owl!]

I mean, something containing exact quotes, word for word, that you wrote elsewhere.

I've borrowed brief phrasings from other people too, here-and-there, especially when I think they really nailed the point. But I'm talking about exact wording, sometimes entire paragraphs, so close to what you'd previously written that it's to the point that it can't be a coincidence.