Me now: " OH NO CHAINS HELP HELP HELP."
Seriously; there are like 20 sounds you can't hear without headphones like the "NO". The headphones make it more atmospheric and 5 times scarier. TRUST ME.
Now onto the main point. You know that thing when the screen goes black and u see the guy waiting at the end of a hall- then black again and he appears again and so on? Well, when I think that happens at about floor 40ish I think it's gunna do that so I reverse. Then I die. Yeah at times it can be the black screen appear, the walking towards, or behind. He doesn't even say behind you. So my advice is to just carry on walking until you see someone- if not you know he was behind you. I know you reeeeaaaaally don't wanna carry on walking but

(P.S: I almost beat the game without getting scared without headphones. With headphones I was literally shaking by floor 15- only to scarequit at floor 22.
That was the furthest I got.