Little known fact: Glass is an amorphous solid which means its in a state somewhere between a liquid and a solid. Have you ever looked at super old windows? Peep the lower reaches of the fragile barrier. You'll undoubtedly spot what looks like melted glass. It's not melted, though. Trust ya boy. It's just the glass migrating down over painfully long periods of time. Like water on any smooth surface, it drips but never drops. I'm guessing the glass we have nowadays isn't prone to this phenomenon since we probably add a bunch of shit to it, but I hope it is because glass is kind of a crazy concept when you think about it.