Dejavu happen when a microvortex appear in a space time continuum and it happen in the proximity of someone's brain when they sleep. It's not powerfull enough to carry physical entity, and it's not powerfull enough to carry your brainwave when you're awake and in full control, but when you're in an alpha state, your control over your brainwave is weaken and this were suck in and transfered randomly through time and space. Sometimes it goes to the past where you can't differentiate it from your pass memory. But sometimes it goes into the future and this memory from the future where stored in your subconcious mind. When reach the specific time and place, it triggered your subconcious memory and you feel that you've been here and done this before.

Source : Star Trek The Next Generation

This post has been edited by Fadly: Nov 22 2010, 04:00 AM