I suspected this since I was a little kid, seeing the shadows of the branches of a tree that stood in between the streetlight and my window. I never liked closing the blinds, so of course I would have shadows moving across my wall at night, especially when it was windy outside and the branches moves in the wind... I never liked how they could look like long fingers stretching from a crooked hand, coming closer and closer... Childhood fears are the most imaginative ones.

I think we all had that fear at some point. Those long, spindly claws suddenly reaching out to grab us!

Oh yeah. It's a primal fear, I believe.