I had a time where I could have sworn that i been there done that.. I was standing in a line at guitar practice, practicing for the concert. I literally saw everything i had just saw in a dream, I know I did.
Another Experience I was standing in line for a ride in Seaworld and again it seemed as though I've seen everything before.
scientifically, deja-vu happens when your brain is working as such a fast rate that it makes a memory of the situation in one part of the brain before it actually registers to you what is going on.
This will be a long post so I will split it up. The feeling seems to have been caused by the dream thing (I'd call it a "subconscious foresight" because even Wiki dosen't have a name for it). The "fast-rate" thing they claim is total BS. I've even written events with details down weeks before they happened.
Although they weren't anything big like seeing a building blow up or someone get shot. No, It was little things like once I had a SF of getting a quiz back in math class (before we had even taken the quiz!). The quiz had many errors. I remembered typing in numbers in my calculator (obviously to find my score as a percentage). I didn't remember the exact numbers that were displayed. I remembered hitting 'clear' and typing again. It displayed a number of 0.4somethingrepeating. I woke up. A few days later I told another student about it.
A few weeks later I got the quiz back. I had been very worried about that score. I typed in my score (22.5/30) and it displayed 0.75. I was surprised by this but as I was typing that in I overheard another of my friends say his score (14/30) so I hit clear and typed that in and it displayed 0.466666666. That was the number from the SF. I was worried for nothing. I told the student that I had told before and he was a little more than a bit scared.
deja vu happens to me more than I'd like to admit. on some days, it's never, and others it happens a lot. I guess in this case, it depends on how often you do the same thing over and over again.
In corelation with th3pr3tz3l's post on page 1 about hearing things before they happen (deja entendu) seems to be an odd subcategory of deja vu. I get it too. (A few months ago,) One night I spontaneously thought of the old song "Sh-boom" by the Crew Cuts. The next day I hummed it frequently throughout the school day. At the end of the school day I was in astronomy class. We were watching a dvd on why we haven't been contacted by aliens (we had nothing better to do. The class ended at semester and that was the last day). It described the unlikliness of life outside earth as well as the immense distances between galaxies. It also stated that although we had sent radio waves (through the means of every broadcast ever transmited) which could be intercepted by intelligent life, that technology has only been in use for about 50 years (which was not nearly enough time for even the earliest signals to reach our closest neighboring galaxies). It showed examples of presidential speeches, civil rights speeches, and music. The last example of music was that song (Sh-boom). I am fairly certain that the student next to me had heard me humming it before class started because he gave me an odd look while it played.
As for the argument that deja vu is "only the feeling of having seen it before" it is likely that it starts in dreams, which are not always remembered and are often ignored.
