Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Nightmare Fuel: Genzo
Sure, some scenes can be scary, surreal or gory. Including Genzo'puppets turning into amorphous masses of flesh and innards, and in the first case, with Tatsumaru's rotting, worm-infested face giggling at the Evil Uncle.
Also when he made the first puppet based on Kiku. The whole scene is awfully similar to a rape scene.