Where 173 is concerned, During the intro, just as the blackout begins and it's all black, it helps a great deal to blink when you can't see; and just as well, it also helps to blink before opening any door. Unfortunately, what sucks is that I came across that one room where you can see SCP-173 through a security feed, and glancing away and blinking rapidly, I can watch the thing running around the place in the security footage.
WHY AREN'T WE ARMED? I would feel a tad more confident if I could shoot the damn thing as I charge through the room. Then again, the muzzle flash from the gun could work against me, and make me blink more (brightness of the flash blinding or drying the eyes out from the heat). Crap.