Both of mine are possessed, that’s why we named them after demons. Pandora is the worst. She used to stalk our feet like they are little mice and go to town, not playful, but like she was trying to rip meat off the bone.
My grandparents had a cat that did the same thing. It would have been kind of cute if he hadn't been so intense about it. I'd guess that most cat psychologists have seen this behavior a thousand times and know its causes.