What worlds/levels or mini-games in gaming scare you?

My list:
E1M8 (Doom)
Shadow Temple (Zelda: Ocarina of Time)
Episode 3 (Sly Cooper and the Thievious Raccoonus)
Kakariko Village Well (Zelda: Ocarina of Time)
Krazoa Shrine 3: Test of Fear (Starfox Adventures)
Boo's Mansion (Super Mario 64)
Pokemon Tower (Pokemon Red, Blue, FireRed and LeafGreen)
Chapter 6 Levels (Yoshi's Story)