OK so I beat the demo and found that artefact in the closet at the end (wonder what it's for) and I went back to the man monster thing (Gray?) and decided to block the door in the room which triggers him with the mattress from the room you start in, and this is what happened.
http://i114.photobucket.com/albums/n244/.../Owned.jpg
And then my brother decided to try make a creepy picture using the dynamic shading, here.
http://i114.photobucket.com/albums/n244/...Creepy.jpg
I tried to also lock him IN the room after he knocks the door down again with the mattress but it hard...gotta be fast