All Amnesia demo discussion HERE

[Yuhaney]

I didn't really understand that what other things there are when you start to lose your mind except that the view goes bit blurry and you start to hear strange sounds and your mouse movements slow down when you're insane enough?
Is there something else into it? Something that makes the game harder to complete?
For example: enemies that wouldn't exist without the insanity, or other hallucinations, like...

Spoiler below!

...the enemy in the halfway the demo which will disappear into dust if you walk next to it?

What I mean, is that after you play the game for some time, and if there is nothing else than these, then this whole "darkness and insanity" thing isn't really scary anymore.