I used to get it a lot more than i do know, one of the best ones was whilst around a freinds house, long time ago we were messing around and i had the deja vu feeling come upon me, but as i did i remembered a dream (I used to lucid dream a lot as well, before the wieght of the world crushed my spirit). In the dream, i was telling my freind about the deja vu I was experiencing in the dream, and what was about to happen, which was that his sister would come into the room and say something (cant remeber what it was now). The really spooky bit was that is exactly what happened as i was with my friend there and then i real life, i started to tell him about the deja vu and waht was going to happen and it all did just like i did it in the dream. Gave me a very starnge feeling as it was if i had no control over what was going on, like it was pre recorded, but it was the dream where i first experienced the deja vu.
sorry if that makes little sense, but it made little sense at the time.