Hey guy's I haven't watched video yet.
But, I just wanted to mention if you guys are interested in the possible science behind this peep out some quantum physics, this is a good start
http://library.thinkquest.org/3487/qp.html
My own personal opinion is that it is likely a property of the uncertainty principle. See, you collapse the wave function by observing it. Like let's say you observed an apple fall from the tree, well in quantum physics the moment you observed the event you YOURSELF changed the event. So in other words by looking when you did you might have caused the apple to fall. Anyhow, that's a crude example. What I think happens when ghosts are seen is the collapsing of light in another place, and since there in some uncertainty naturally in the universe it could have transported the wave function of the light to another time and place. Also due to the number of sightings we can't scientifically say the ghost phenomenon doesn't exist... I mean the whole basic for science is observation... just because science can't explain it doesn't mean it wasn't actually observed.
Now in a very old piece of fiction I wrote I toyed with the idea of a quantum consciousness that is more powerful than the physical world. I placed it in the 9th dimension ala string theory. There used to be a theory that gravity came from the 9th dimension also, since science can't explain that either lol. Like science knows where the gravity is, and that it comes from objects, but what it actually is nobody knows.
Well, maybe ghosts come from another dimension who's wave function momentarily collapse due to some phenomenon in the multiverse. The multiverse is the little bubbles that surround our universe, and the actual fabric of that multiverse.
I love quantum physics, too bad I am too stoned to not ramble on lol.
Well here's site again, it's a good start
http://library.thinkquest.org/3487/qp.html