Just before my last two naps, as I was falling asleep on the couch, a visualization arose. There were two rectangles, like dominos on their sides, each with 2 symbols and they were transparent and rotating. I had to mentally match the symbols in order to pass and reach dream state. Cool, but what if it happens again and I can't solve the puzzle?
After this last experience (which includes the nap) I oddly feel...better!
Fascinating.