Someone posted an interesting interpretation of that video:
Quote:
Seriously, it's not that hard to comprehend. Four people go to a pool. Two of them have sex, and the girls friend tries to have sex with her, but she's scared and not ready. The "magical *****" is her feeling horny and not understanding it. The girls friend gets pulled into a threesome with the other two people. She sees the threesome and tries go home and forget about it. And when she gets home, she sees her parents having sex-which is what the giant thing was. Her innocence is lost.
The music was pretty good, though.
TvTropes has a list of a lot of Nightmare Fuel advertisements. Most of them are of the "scare them straight" variety, like anti-drunk driving or texting while driving ads. There's still the occasional one that was just accidentally horrifying, like the PS3 one above.
I'm a big fan of Creepy Pasta, most of which comes from 4chan's /x/.
Here's a buttload of images.
Gonna slap a NSFW tag here for blood/gore. I didn't see any spiders, but it was a quick glance.
This image is one of my absolute favorites.