The full dream is my latest entry to my dream journal, but I'll let you have the quick version.

There was a plane crash as soon as I realised I was dreaming.

There was a lot of dreaming up until this point, which was non-lucid. I just enjoyed it and went along with it, as you do in an unintended natural dream. However, at one point I wasn't really doing anything other than walking and feeling sad about a past event, which is not important (if you read my DJ you'd know the point I'm up to) to the plane crash, but the doing nothingness brought the slightest flicker of lucidity into my mind. I thought about it for a second, when the crash occured. It gave me quite a fright, and I ended the dream.

So it seems, that as soon as the idea of lucidity came to me mid-dream, something bad happened. Is this coincidence? Or has anyone else experienced similar things?