Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Nightmare Fuel: Audition
Any sequence involving the man in the bag.
The scenes where Asami puts cheese wire to good use. While giggling like a schoolgirl. Viewers may be reduced to peeking through their fingers during these scenes and trying vainly not to think about their feet suffering the same fate...
Also, "Kiri kiri kiri" (Cut cut cut)... although it's translated incorrectly in the subtitles as "deeper".