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Nightmare Fuel: The Boondocks
The implications of Gradad's whipping on Riley making him the way he is. Its actually very terrible if you know someone who was messed up through mental/physical scars by belt lashings.
The whole episode of The Boondocks "Smokin With Cigarettes." Normally, this show is a political satire, a comedy and an action/slice of life show. THIS episode is about the exploits of a sociopathic child named Lamilton, who mercilessly hurts and endangers people because he thinks it's fun. "I like doin bad things," he says. His eyes are dead, totally devoid of emotion. His childhood was traumatic and abusive, but he is a completely unsympathetic character. He claims that he wouldn't care if he kills the people he hurts- he means it. Even Riley the jerkass thinks he's a monster. Lamilton causes countless car crashes, punches people, tries to rob an old woman, actually shoots that old woman's dog to death, and tries to kill Riley!
You want to really have a reason to stay up all night? There are real kids out there just like him. They're just limited in the damage they can cause because they don't live in a cartoon.
Also, when Lamilton falls off the school building in the end, he just gets up and walks away. Yes, he is apparently immortal!
The entire scene where he comes home to Sarah in Tom's body, and you don't see his face. And Sarah doesn't recognize the obvious difference in his face.
Uncle Ruckus, a black man who has been broken down to such an extent that his entire existance has become a hideous mockery of the old black "Uncle Tom" stereotypes, due to his cruel, abusive father traumatizing him so badly that he hates his own race to such an extent. This gets even worse in one episode where he founds an entire church based on getting black people to hate themselves. The man is so incredibly mentally broken that when he's told via DNA testing that he is 100% black with no margin for error, he completely loses the will to live.
This especially applies to him when he goes from relatively harmless to dangerous.
Ed Wuncler Jr. While his son's sociopathic tendencies are amusing, he's rather... unsettling.
The flashback of the raciest townspeople attacking the Freedom Riders.
The entire concept of freedomland: A slavery amusment park attended by people who don't seem to care just how horrifying the concept is and staffed by people who are so far in debt to Ed II their forced to work their in rather degrading circumstances. If that wasn't bad enough, their then forced to stay there, living as actual slaves did.
Ruckuss is paticuarly horrifying in this episode. The sheer amounts of joy he gets and his refusal to listen to how insane he's being are rather horrifying.
Ed II trying to cut Huey's foot off.
Ed II trying to branch Freedomland.
Everything about Robert's digital phone assistant Siri in "I Dream Of Siri", from being able to hack his accounts and Facebook page and even being able to mimic his voice in order convince the government that he's a member of Al Quaeda, resulting in Robert almost getting kil;ed by a drone strike.
The fact that anyone would want to clone Stinkmeaner.