Have you ever experienced the Tetris effect?
If you don’t know what it is: http://en.wikipedia.org/wiki/Tetris_effect
What has been your experience with it? What game were you playing or what activity were you doing for this to occur? What were the positives and negatives? How long did it take to do the activity continuously for it to happen? Was it in your dreams, was it hallucinations, or was it during the day? Why do you think your brain does this?