Final Destination/Nightmare Fuel

Series-wide

 * Many of the deaths are quite frightening. That, and the movies' premise.
 * Specifically, the opening disaster scenes, which prey on our everyday fears (flying, driving, carnival rides and now crossing bridges).
 * Bludworth himself seems to be nightmare fuel for various reasons: 1. He is played by The Candyman himself Tony Todd. 2. He knows more about death more than anyone else. 3. This is the big one: He may as well be the reaper himself and only gives the protagonists cryptic advice because he took pity on them. The other characters on the list were either already dead or too busy to talk to him.

Final Destination

 * Out of all the deaths, one of the most disturbing and drawn out from the first one was the teacher's.

Final Destination 2

 * The shadowy, skeletal hands.

Final Destination 3

 * Busted or not, the tanning bed death in the third movie is still horrific.
 * From the third movie, Erin's death. For extra Paranoia Fuel, the first video that shows after typing 'Death by nailgun' in Youtube's search bar is a clip of that exact scene. Coincidence much, or maybe this, too, is a part of Death's plan?
 * The entire concept is bad enough. (Oh, you managed to avoid dying? Fine. Now your death will be several times more horrifying, painful, or both.) Then there are some of the deaths themselves. To this day, I am unable to listen to the song "Roller Coaster of Love" thanks to the third movie, where it played as two girls
 * That scene is the reason why I will never ever EVER use a tanning booth. The rest of the deaths seem hilarious,  but the thought of dying that way! Ugh! It doesn't help that where I am from, a 10-year-old girl managed to give herself something like 2nd degree burns to 70% of her body.

Final Destination 5

 * The nail was on the gymnastics bar was terrifying for some reason, I really thought she was going to slice her Achilles tendon or something. But when she actually did die, that was just, AHH. The fact that she's still twitching is even more horrific.
 * The in the fifth movie. Holy crap.
 * Oh Lord. The trailer featuring that scene started airing roughly two weeks before I was scheduled to get It turns out  doesn't work that way, which should be comforting, but really isn't.
 * Something that is also comforting is that
 * The scene in question is here, oh how I pity the curious. Don't watch if either you are planning on getting a LASIK operation or just have eyes.
 * Do watch if you are a laser enthusiast. The amount of inaccuracies in that scene will induce a healthy dose of laughter.