The night hag comes to mind, a cross-cultural supernatural creature with a mundane physiological origin: https://en.wikipedia.org/wiki/Night_hag https://en.wik

The night hag comes to mind, a cross-cultural supernatural creature with a mundane physiological origin: https://en.wikipedia.org/wiki/Night_hag https://en.wikipedia.org/wiki/Night_hag So, some common sensory interference might suggest many-limbed things, maybe. Like how LSD makes things wobble and crawl about.