In my dreams, I rarely can move in the direction I want. Usually, when I try to move in one direction, my body moves in the direction I do not want it to move the most. For instance, if I am trying to leave a room, I always begin to slide back into the room. Or, when I want to turn left, I look left and begin walking left but my body slides to the right as if I am on ice. This happens particularly when there is something that I REALLY don't want to get to, like some sort of frightening horde of zombies, then my dream always moves me towards what I dread most. I find that in my dreams things follow the rule, "whatever you think is the worst thing that could possibly happen, it will happen."
I think that the problem in my dreams is that I doubt my own abilities and I try to predict what will happen next, like I'm watching a movie. Perhaps I can turn this towards good by predicting better thigns to happen. Instead of subconsciously thinking, "I won't be able to move, and I will slide in to this pit full of bloodsucking demons or something just like I always do" I should think, "I will have complete control over myself and I will really enjoy what's coming next"
However, this is difficult.