If you don't want to know where a monster may be stop reading now.
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Spoiler below!
I glitched one of the monsters in... I believe it was the storage room, I may have to take better notes on my second play. Anyway it saw me and I bolted behind a half-height cabinet/shelf but it was too late, it came around and out of panic I accidentally shuffled into a slight corner/crevice. The monster would claw the wall next to me, look vicious for a while (and drain my sanity ), get bored and walk away until he got to a point where he suddenly realized I was still there and would come running back to claw at the wall again. This when on for about 5 minutes until I was eventually able to crouch at just the right angle to get him to walk fully away. It was pretty cool to finally see a monster up close, but the situation was a little silly (there's no reason he couldn't have come forward a few feet, turned and clawed me).