My most lucid ever dream turned into a terrifying figure of a witch/crone slamming me in the chest while screaming "you're not supposed to be here!" And waking me up. Scared the shit out of me. Didn't try again for a few years. Everything was fine, but as soon as the woman in the field saw that I was lucid she changed. On several occasions dream characters had become irritated with me when they realized I was lucid, but that one... She made me afraid to sleep again. I know that's not rational, and I know there's nothing actually supernatural going on... But damn did it freak me out