Stories pass from generation and area it seems, and slightly differ. But in essence it seems to be quite a wide and well known story.
I got to admit, it is too intriguing for even me to comprehend.
Generally, it is a spirit that inhabits bodies. More towards those of native culture.
I never believed in ghosts (tho I had an opportunity to of maybe become aware of one, which I was refused) or spirits, but this sheds new light on the matter for me. It seems this phenomenon is quite well known even tho you never hear of it (Unlike spotting critters in the water and aliens).
But, fact of the matter is…. there have been no creditable sources regarding this in the present. With makes on wonder if it is simply an urban myth collaborated by the people from the 1800-1900’s. And since communications between areas where low, certainly slight variations occurred.
Generally, we may never know.