I've had lucid dreams quite often and a few episodes of sleep paralysis, neither had anything to do with smoking, they just happened. The sleep paralysis is scarey but the last time was many years ago. The lucid dreams can be pretty scarey too, the last one I had concerned an intruder coming into my bedroom and I could actually feel him sitting on my bed and leaning over me. I turned round to look at him and woke up thank Heavens. Dreams are OK if they are nice! I hadn't been smoking.