Impressive, especially the linked YouTube video. Reminds me a bit of the old Alan Kay video lecture with the faces and scary inverted mouths. (I can't help but think of Vanilla Sky when I look at that mask, either.)
This actually reminds me of disneyland. In the hallway to get on the haunted mansion they have these inverted busts that seem to stare at you as you walk around the room. Interesting effect in person.