I have 'em all time, where my mind hits flashback mode and I have no idea why it's happening only that my mind makes a weird connection like I've been there/known this person/experienced this action before. And yet there's no way that I have(Job Corps was when it just happened the most). Maybe it's some of those dreams that I didn't remember?
Yes, I was just thinking about this issue earlier. I have been reading a lot about reality and time not being linear and I think that this may help explain the Déjà vu mystery.