Rhiannon was mauled by it?

The theory about the shadowish people being sort of harmless, I've been mulling over it and I really don't think so. Shadow people seem to like darting through rooms a lot. From what I've heard, they produce a really sickening feeling, but I've never seen any except the few times I saw the Slender Man. I can't remember if I mentioned this or not, but a couple months ago Rhiannon had a horrible claw-scatch mark on her back, and the next day it was gone. So today she pushes up her sleeve, and on her shoulder there's this horrible claw mark, really long and deep, and still half-clotted. It was almost surreal. I kind of flipped my lid with excitement -- I'm a terrible person, but I wanted to get photographic evidence before it disappeared -- but no-one wanted to humour me and let me use their phone to take a picture.