I have an interesting idea for people to try. Take 4 pieces of paper and let someone write numbers on them, shuffle them and place them somewhere without seeing the order. It should be in a different building from where you sleep, so you can't look at the cards while sleepwalking. Then during astral projection, go to that place, look at the cards and remember the order and when you wake, write then down. If you get them right, well that would be phenomenal.
Would be interested to know results, if somebody tries.