I must be crazy, but the prison didn't scare me *that* much

[mattwestwick]

The idea behind this level is that if you get lost and disorientated that's when you panic.

However if you know where you or going or luckily go the right way then it's not bad.
It's in the commentary that the layout is actually quite simple and that the low light levels and lack of landmarks are supposed to confuse the player.