Well this happened to me a few nights ago. I had gone to sleep and then actually gotten a good nights sleep, so vivid dreams were obviously comming. I'm asleep, and everywhere I turn, no matter which way I elevate my head, or how much I turn it, I still saw the same continous 2 second image: it was a plane crashing into a building. The rest of the dream was about the towers, but they were really distorted and smaller (one was very short, the other moderately tall; my view was looking vertically up, gazing). There was no burning, but I saw firemen in the building (I was actually in the building, which was too small to be a skyscraper), and they were really anxious and nervous and stuff, like there was a fire. The sky was clear, but at the last seconds of the dream, it was dusty and grimm, dark and depressing, but alas, I did not feel any emotion. It wasn't even like watching a movie; it was just emotionless.

My question is, why is it that when normally scary things happen in your dreams, you are not afraid of them at all. You might actually (not always) laugh at the situation, which not at all amusing. Is this just a subconscious thing, or is it really your outlook on things?