I experence the dream thing too, usually it works well as a warning if something bad is going to happen. Im right almost every time! it happens to John too. Once I was studying late and he called me in a panic telling me not to drive home, that he was coming to pick me up. So I trusted him, turns out there was a huge accedent on the road I usually take! He said he dreamed that if I went the way I normally did I would end up hurt! Weird...