I too dream within a dream and within that dream I know that Iam dreaming! I have only had two of these. The first time I knew because the hinges on a door had changed from one side to the other. The second time, last night was because the clock kept changing. However, even though both times I knew within my dream that I was dreaming I did nothing about it, didn't get excited just carried on dreaming and sort of forgot. How disappointing! Hopefully more will come.