haha, since i posted this earlier iv had two more dreams come back to me from lastnight, one in which my housemate had crushed a load of thai crackers into my bedroom carpet, and another in which i bumped into my old housemate from a year ago.

i can deffinately see how this links in to de ja vu. There have been occasions in the past where I've come across a situation in my day where i feel like i've previosuly dreamed the exact situation. Usually gives me a strange churning feeling in my gut too.
Maybe it's just that the situation reminded me of a dream in which a few characteristics were similar.

i've never really taken an interest in the tricks the mind can play on you before. I'm enjoying these forums.