This is based on opinion. Please don't list it on a work's trope example list.
Nightmare Fuel / Cat Soup
While more awe-inspiring than terror-inducing, it still has its incredibly disturbing moments.
The time scene. Time gets sped up and then reversed all while horrific scenes of violence, such as a woman getting into a car crash with her baby on her lap, and some prisoners getting executed via gunshot wound to the back of the head, play.