I have something against insects, so i go all "whoa, ew!" every time i score a critical hit in VATS.
Also, in Fallout 1, i got my CA, a assault rifle and stumbled into centaur/floater encounter for the first time...
1. What the shit...
2. Better kill it. Now. Burst it.
3. ITS STILL WALKING TOWARDS ME OH GOD I WANT OUT!
4. RUN! RUN!
5. ITS TOO FAST!
6. IT'S CHEWING ON ME, WHY AM I SUDDENLY IRRADIATED OH GOD!
Few days i was quite unsettled by their design. I thought their teethed mouth was located between their heads.
Also, Molechs fall also in this unsettling category, even if Van Buren wasn't released. I also wondered if Burham Springs was inspired by Silent Hill, or, rather, by Centralia, the real thing.