The glass thing happened to me many times when the glass is cooler than the table and humidity accumulate below. a little blow of air or an uneven table top and the glass will move that way. That's a nothing burger.
You say that because the alternative explanation scares you...
lol There's no alternative. It's all about physics and like I said I experienced it plenty of times.
>lol There's no alternative.
Oh yes there is...
There's jews in the glass.
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