There's a great line in "Close Encounters of The Third Kind", where one of the scientists points skyward and says ..."Albert Einstein was probably one of them". I have to agree - and I'm not about to go into a Quantum Physics rant (though I'd love to! That kind of stuff totally rings my bells). But Professor Einsten made time and the fact that it doesn't make sense...well...make sense. If you care to jump into the subject and let your brain be swirled and agitated like a clothes in a washing machine, may come to see that the sensation of deja vu makes perfect scientific sense.
Case in point...Conan O'Brien, 1998. Discuss among yourselves.