Hell Is That Noise: Western Animation

  • The Amazing World of Gumball
    • The Void's static and everything related to it. Including Rob's appearance in "The Nobody".
  • Avatar: The Last Airbender
    • "There's no war in Ba Sing Se" and "The Earth King has invited you to Lake Laogai."
    • That bird that freaks out the Gaang in "The Swamp." Appropriately, it's called the Screeching Dodo. It's pretty harmless, though.
    • When Azula experiences her mental breakdown when she's trying to fix her hair for her coronation we hear some creepy Psycho Strings play.
  • The Legend of Korra
  • The Joker's laugh on Batman: The Animated Series can be this to characters from time to time.
    • Hearing it from The Joker himself isn't the only thing that makes it qualify for this trope. On multiple occasions, you have him using his trademark smile toxin on unexpecting individuals, causing them to uncontrollably break out into that same laughing madness.
    • Also, in the uncut version of Batman Beyond: Return of the Joker, after getting shot in the chest by a "Bang!" Flag Gun and muttering out his Famous Last Words, the Joker emits a dying gurgle as he gets choked up in blood before falling down lifelessly onto the floor.
  • Courage the Cowardly Dog loves this trope.
    • The repeating "It's Doc Gerbil's World!" song that sounds like the demented cosmetics themed version of "It's A Small World After All" during the boat road in "Human Habitrail".
    • The "Freaky Fred" episode. The most disturbing scene is when Fred and Courage are locked in the bathroom together and Fred shaves Courage with a manic grin on his face while a haunting chorus of "la-las" starts to accompany the already eerie music.
      • "You're not perfect"
    • Katz's Leitmotif, a smooth but unnerving jazzy beat that always plays whenever he's onscreen and overrides any other background music..
  • In Ed, Edd n Eddy: Jonny 2X4 cracking his knuckles in "Shoo Ed".
  • Gravity Falls: Bill leaving in "Dreamscapers".
  • Unsurprisingly, Invader Zim
    • "Dark Harvest" gives us the sound of a pigeon cooing - warning the characters that Zim is nearby and is going to try and steal their organs, replacing them with something else...
  • Anytime a character screams on Johnny Test.
  • "WESSST!" from The Marvelous Misadventures of Flapjack.
    • As well as the Skymaid's usage of the word "Yes" from the episode "Gone Wishin".
    • "CLOOOOOOOOOSED." Don't tell me you didn't wet your pants.
    • She's heeeeeeeeere.
    • The growl-like cat sound that accompanies that cat.
  • The Maxx: The animated series featured a flashback story from Mr. Gone's past and Julie's childhood, involving a dying bunny in a box and the scratching noises it made with its good leg.
  • My Little Pony: Friendship Is Magic:
    • In Twilights Kingdom Part 1, Tirek's magic drain is accompanied by a rather chilling screeching sound. In Part 2, his theft of Discord's chaos magic is accompanied by a distorted, possibly reversed version of his normal drain sound effect.
  • A more comedic example from our friends at Robot Chicken
  • Played for laughs in a Rocko's Modern Life episode, where the gang is shown walking in a forest and they suddenly heard a noise, freak out, and shout "What was that?!" Filbert calmly walks past them saying, "Oh, just a twig snapping", which turns out to be true.
  • Roughnecks: Starship Troopers Chronicles does this in one episode, in which Rico hears a mysterious and creepy grinding sound while in a recovery vat after sustaining heavy injuries in battle, a sound no one else can hear. His crew and the medical team working on him all worry about his mental health, until bugs emerge in the base and they realize he could hear them tunneling in.
  • Rugrats:
    • The voice of the monster under Chuckie's bed in the episode "Under Chuckie's Bed".
    "Hi, Chuckie."
    • The horrible creaking noise of Angelica's chair in the episode "What The Big People Do".
    • The voices of Not!Tommy and Not!Stu creep Chuckie out, and while they're talking, the background music that plays lets ''you'' know something's wrong.
  • From The Simpsons:
    • The gunshot noise Maggie's pacifier makes at the end of "Who Shot Mr. Burns?".
    • There's a whole room full of scary pacifiers about three-quarters of the way through "A Streetcar Named Marge", when Homer comes to pick Maggie up from the daycare center. Why are they scary? Well, they're literally the only thing on the soundtrack. They're echoing ominously. And all the babies are staring glassy-eyed at Homer.
    • Sideshow Bob, on occasion. "Hello, Bart..." -> Cue terrified scream....
    • Whatever the Simpson family was screaming at, at the end of "Homer Loves Flanders".
    • The Circus of Fear music heard as baby Bart looks upon the very inappropriate clown crib Homer made for him.
    • "Now how 'bout a hug?"
  • Spongebob Squarepants:
    • The loud buzzing sound that came with the live-action deerfly close-ups in the episode "Wormy".
    • In "SB-129", Squidward travels through time and ends up in a blank white void. He remarks to himself that he can finally be alone... which is when the word manifests itself as a colorful caption. Then a series of disembodied voices start saying the word "alone", accompanied by more colorful representations of the word, until Squidward finally snaps and tries to get out. Just those calm, echoing voices that repeat the word "alone".
    • The squeaky boots and Mr. Krabs.
    • The grinding noises that accompany SpongeBob's transformation into SpongeSnail.
  • Steven Universe:
    • The sound made by the fusion experiments in the episodes "Keeping it Together" and "Nightmare Hospital". reminds a lot of Lavo's Cry
  • Teen Titans used this in form of a heart beating with the villain Kardiak, a giant heart with metal tentacles that eats children.
  • Yellow Submarine has the evil clown alarm, as well as the creepy noises in the sea of monsters.
  • Wakfu: Grougal lets out an unholy shriek at one point that sounds far too much like a human's wailing to come out of a dragon's mouth.