Scariest Crap In You Pants Moments

[Modular100]

The scariest moment ever, must've been when exiting the storage. I accidentally looked away from the screen for a split second when approaching the exit, and as I turned my head back, I just heard that long, horrific moan and saw a grunt sprinting towards me. I screamed like a little kid and flipped my chair over backwards, and very nearly knocked my entire computer over.
One thing that scared me as well, was when entering the entrance hall (no monsters there, I knew that from seeing a video), but it showed me how to run. I didn't really want to do anything that required me to run at that point... :S