From a recent nightmare (GIF)

This thing paralyzes me with fear. I dream about it regularly. It never actually does anything but scare the everloving shit out of me as it gets closer and closer. 
I'm not a talented artist. I didn't try to draw the body. It has long, slim limbs and long, bony digits, doesn't seem to be wearing anything, but has no sign of genitalia, either.
The original image and the subsequent images for the gif below was created in a free Linux imitation of Photoshop called G.I.M.P. and then they were combined into the gif at how-to-make-gif.com.