I've dreamt about plane accidents before but nothing has happened in real life... think about how many people there are and how many types of dreams people experience over a night. Of course there will be coincidences.
To be fair I have had some scary experiences. Like Andrew remember we were playing Who Am I and I guessed the answer basically a second into the game without looking at you or asking you a question. That's definitely knowing someone inside out though I think
I respect your opinion, but the fact is that not only DID something happen at exactly the same time as my dream (and I've never dreamed about plane crashes before) but I was actually on board that plane. My mother's childhood "Titanic" dream also occurred on the night the ship sank. Dreams are very complex things and, despite the number of "experts" on the subject, I don't think anybody fully understands them.
I went for Dream Group Therapy once a week for 10 weeks after my mother died because I was having terrifyingly vivid nightmares, many of which included her, and, I have to say, even the lady in charge of the group was quite shocked by the intensity of them. However, just talking the dreams through in the group seemed to have a positive effect and my own conclusion was that, while I was sleeping, a lot of emotional stress was coming to the surface, so sharing it and talking about it was obviously going to help.
Your experience with Andrew could, as you say, simply be because you know him so well and so just briefly got onto his "wave-length" - telepathy, ie thought transference, in fact. It's not that unusual and least there is some scientific evidence to support its existence.