Thanks for this Derek, the similarities are indeed interesting! Any idea how universal the Hat Man is? The writer of the article you link to claims she named him and the name stuck, which suggests he's a recent addtion to the ranks of demons/shadow people/archetypes/cultural memes/internet scams/other favoured interpretation.
It's very difficult (but great fun) researching this sort of thing online because the myths, hearsay, scholarly research, anthropology, parapsychology, wild-eyed conspiracy throries etc. are all muddled up. Any evidence to suggest this Hat Man has been around for more than five minutes?
You've reminded me of the
Old Hag, a vision commonly seen during
sleep paralysis and
documented by many cultures through history. She takes the form of an old women who sits on her victims chest while they sleep, often suffocating them or reaching out a clawed hand to stop their heart.
Sleep paralysis is a state between sleeping and waking that combines muscle atonia (present in REM) with a false awakening, lucid dreaming or true waking consciousness, possibly accompanied by terrifying hallucinations. It's commonly invoked as the 'real' explanation behind ghost sightings and alien abductions, amoung other phenomena. I personally experience sleep paralysis regularly, it can be extremely unnerving! I think it's relevant because half states, dreaming and 'real' explanations lurking behind the apparent are all very MD.
Specifically, Irene chases Diane onto her bed, arms outstretched to take her life away. A case of the Old Hag archetype surfacing in film?