Dreams are a result of your subconscious mind. Whatever you think or feel affects your mind. Sometimes, when you have a dream, you start believing in that dream and your behavioral pattern changes accordingly. This may lead to the dream actually becoming a reality. This can be a bit frightening. There is a concept of Precognitive dreams . These dreams give you information about what will happen in the future. I once had a dream about scoring 87 percent in a particular exam and the next day, I actually scored 87 percent. Also, similar kind of events occurred that I had dreamt before. It was a shocking as well as surprising for me.