Destiny, the level where you walk through pitch black caves and then in reverse after unleashing the beast, especially once the restricted spawn message comes up.
KZ SF derelict space ship level.
Resistance 2 - the level where the entire suburb is zombie cocooned and then they all burst out.
Dunwich horror bit in FO4
Whoever said life to be like a box of chocolates clearly didn't know what he was talking about.
Life is more like a game of bumper cars. At every turn there is a possibility you will get screwed.