Hello! I'm sorry if I'm posting this in the wrong section. I didn't know where else to put this. So here's the problem: Sometimes when I put a glass of water after drinking from it on my table (which also has a glass surface), the glass slides a little bit on its own. Sometimes it happens right after I have put it on there, and sometimes it stands still where I left it and slides after some time has elapsed, comes to a stop and slides a relatively smaller distance again later! I've also observed that this only happens when the glass is wet and while, this doesn't happen every time, it has happened enough times to convince me that I'm not hallucinating. So, it's just been bothering me what the real cause of the movement is. I'm sure as hell it's not magic.