I've experienced bits and moments of sleep paralysis, where I'm awake but my body is still sleeping and immobile, but never where I would dream in such a state. That indeed would be so disconcerting, to feel trapped and unable to move while these fantastical images played out in my mind and consciousness. So glad that he was able to parlay these unique, if troublesome, experiences into a form of creative expression, to the point where he could make a living at it and educate others while simultaneously giving them cause to think and inspire with his art work. Good stuff!