I just watched Patrick's playthrough of the teaser (linked on the previous page) And you can tell he was clearly distraught while playing it. Almost to the point where he wasn't enjoying because he was that uncomfortable about it.
You know, one of these days a GAFFer needs to do a break down or start a discussion about some of the game design concepts on this game (rather, teaser).
It's merely two hallways, and a bathroom. Yet, it's scared more people than any fully fledged horror game has. It's gotten people to spend 5 hours + playing it. There are no cutscenes, no tutorials, no button prompts, yet is able to achieve all this through visual and sound design.