* Being devoured by a Tomogara results in you being replaced by a Torch. Bad enough that your remaining life is [[AndIMustScream spent as a sort of cosmic scab meant to insulate the universe from your disappearance]]. What makes this NightmareFuel is that when the Torch burns out, not only do you die, but no one will ever remember that you existed at all. There's an episode that chronicles Yuuji trying to save a Torch; watching her run down and burn out is equal parts TearJerker and this trope. If memory serves, the episode even ends with "What have we been doing all day?" when she does vanish. Brrrr.
* Any time Tiriel and Sorath [[BrotherSisterIncest make out]]. It's just, ugh....
* Margery Daw's DespairEventHorizon, made worse by the fact that she already has had a hard life lasting for ''centuries''.
* Snake of the Festival Yuji's [[http://www.youtube.com/watch?v=X8yJq0yHI8c interaction with Shana at the Sereiden]] mostly because the [[DoesThisRemindYouOfAnything screenshot angles make it look like]] as if he was going to ''[[RapeIsASpecialKindOfEvil rape]]'' her.
* Snake of the Festival Yuji ''[[http://images.wikia.com/shakugan/images/4/4e/Creation_of_xanadu_arc.jpg smiling]]'' [[TheUnsmile for the first time]], and it's NOT pleasant ''at all''.