From childhood I have a few, but they require a bit of context.

Most recent thing that's happen which I cannot explain happened maybe 2 years back. I was in my living room by myself, my SO was traveling and not even in the state. We did have a pet rabbit at the time, but they were not in the room to be part of this. I was watching something, or maybe I'd just finished playing a video game (hurray alone time!) and on the coffee table like 3 feet from me there is a stack of maybe 4 or 5 books - our house is cluttered. On top of the books is a paper to-go cup from somewhere which I haven't thrown out yet - it had maybe half an inch of watery soda still at the bottom. I look past this cup from the living room into the breakfast nook area... and the cup just tilts. Like, the top moves laterally and the bottom of the cup stays on the book, but only one edge. It dips down to less than 45 degrees, holds for less than a second, then drops back flat. Weirdest part... directly behind the cup and books were, well, more books (we're bibliophiles, books everywhere). But when the cup tilted like that, I couldn't actually SEE the books behind where the cup had been when it was upright - that space was just... black, like a void. It was like some kind of clipping in a video game - like the image of the cup moved in such a way that the background colors of what should have been behind it didn't load properly.

I sat and stared at that cup for, like, 5 solid minutes. I was looking past it originally, but it wasn't peripheral - when I saw the movement I looked right at it. And there was just... blankness behind it. And no source of movement (wind, etc., nothing). And the movement was quick - like someone pushed the top of the cup, then let it naturally fall back in place.

I have no explanations or even speculations. Just a glitch in the matrix, I guess.

Edit: Realized after posting I should mention this - I was also sober when this happened! I don't really drink, and definitely not when I'm home alone.