The Phantom Potty

OK. So I'm in the bathroom, doing my thing, when the toilet in the stall next to me flushes. The door was open when I walked by it, and no one had walked in after me, and they are auto-flush potties, so I didn't think too much of it, until it did it 4 more times while I was in there, and then two more times while I was washing my hands! Behold the phantom potty!