• In Milo Murphy's Law it is revealed that Melissa is afraid of roller coasters because Phineas and Ferb's crushed her science project, and was just a few feet away from crushing her too. So, how many inventions of Phineas and Ferb (when are not destroyed at the end of the episode) have caused collateral damage or even risked to kill someone?
  This is plain old Fridge Horror.

Journey to the Center of Candace

• This is, as a whole, a mildly creepy episode, which may or may or not be a Shout-Out to a beloved Disney attraction. Its status as Nightmare Fuel is understandable due to its "Fantastic Voyage" Plot, but the real kicker is during the song "Hemoglobin Highway", when an entire eyeball is seen inexplicably floating around in Candace's bloodstream. And it's not just randomly placed in the background, it takes up half the freaking screen. To make it worse, said eyeball watches the boys as they pass by in their mini-sub. Oh, and it's a Big-Lipped Alligator Moment to boot.
  "Mildly creepy" is a phrase that means "not very creepy".

The Chronicles of Meap

• This◊ thing.
  Weblinks Are Not Examples
• Doofenshmirtz's childhood best friend, Balloony ventures into the Uncanny Valley territory.
  Zero-Context Example
• Ferb flies so fast that his face is ripped off his skull.
  Is this just a one-off visual gag? I'm dubious that a kid's show would have the main character's face literally get torn off for more than a one-scene joke.

Picture This

• Grandpa Reg literally lost his feet without visible reason (it was the boys' teleporter) and got the feet back, only backwards. This is played for laughs.
  Well if it's Played for Laughs it probably isn't terrifying enough to qualify.

Ask a Foolish Question

• "I know what we're going to do today! Build a... super... computer". Except it looks like this◊. Oh, and it is also a Literal Genie that is not afraid of pulling Gambit Roulettes at your expense. It says "I knew this would happen" and then explodes at Doofenshmirtz's building. IT KNEW IT WOULD DIE.
  Is this image supposed to be frightening? That last sentence also sounds a bit like Fridge Horror.

Skiddley Whiffers

• We find out that Doofenshmirtz has a fire hydrant stuck under the skin of his leg.
  As someone who hasn't seen the show, how is that scary?

The Curse of Candace

• The song is a parody of teen vampire movies, but the coloring and Ozzy Osbourne-esque voice make it chilling to the core.
  This kinda sounds like an overreaction.

Escape from Phineas Tower

• This episode is creepy on so many levels. That's right, Phineas and Ferb deliberately created an AI smarter than them to trap them repeatedly - a new trap every time they escape one - so that they may never be able to get out. The mallet they built to smash it from the outside in case of the inevitable emergency? Doesn't work. And then, when they finally get into their backyard (by tunneling through the ground), the thing traps them with a shield and announces its plan to cut off their air supply. The happy ending? The shield expands to include the entire galaxy. Cold comfort. (As a little-added bonus Fridge Horror, Candace, who'd typically come dashing in to bust/save them in an episode of this type, is asleep the whole time.)
  Not sure whether the whole example should be cut, but there's a link to Fridge Horror in there (which seems to be misuse).

Gi-Ants

• Played for laughs, but Carl turns the lights off when Monogram finishes briefing Perry and Perry leaves, and when Monogram tells Carl to turn the lights back on, he's answered only by an evil laugh, and Carl says that it wasn't him...
  Another thing that's Played for Laughs.

Norm Unleashed

• For such an upbeat-sounding song, the lyrics of "Weaponry" are pretty shockingly dark:
  Just make an example of
  Representative sample of
  And most of them will not be missed! [...]
  Never mind the fatalities
  Where there's municipalities
  To crush a set of with the threat of
  Weaponry!
  • It doesn't help a bit that it is cheerfully sung by a smiling Norm, of all people.
  • Norm actually threatens the Tristate Area with a nuclear weapon!
    Not too sure about this one, but is a song really that scary?

Where's Perry? - Part Two

• The evil Phineas robot's transformation.
  "I know what I'm going to destroy today."

  Another ZCE

This Is Your Backstory

• Doofenshmirtz's evil monster form.
  And another one.

Blackout!

• The mysterious kid with the eyepatch also counts.
  "But is it my left eye or my right eye? You don't know."

  And yet another.

Fly on the Wall

• The sheer number of times Candace nearly gets killed in this episode, especially since half the time it's at the hands of her oblivious family and friends.
  Four ZCEs in a row!

Terrifying Tri-State Trilogy of Terror

• ...
  • Also a Brick Joke from "Nerds of a Feather" appears, (the rare Ducky Momo collectible plate that had a typo making it accidentally say "I hate people") is very cleverly added into the background during the chase song, but the situation when you see it makes it both funny yet ironically disturbing at the same time. Plus, not long after she got said plate she dropped and broke it.
    This is described as being funny.
  • The second 'story' was more funny, with Doof summoning the Inexplicable Giant Floating Baby Head so he can get three wishes. However, to symbolizes how many wish he has left, his hand has the faces and hair of the Giant Floating Baby Head, which can even make his fingers move on their own! Doof even comments on it being "Slightly Horrifying".
    This is also described as funny.

Mortal Kombat 2

• The Living Forest stage features a dark forest filled with live trees. The trees have dark soulless eyes, unsettling looks on their faces like they want to eat you alive, and will often groan while making a horrific facial expression. Some trees are just stuck in a horrific facial expression. There are also corpses strewn about that have apparently been killed by the trees. Often one of the game's characters will appear, sneaking a peak at the fight from behind one of the trees in a blink-and-you'll-miss-it moment. According to one comic, the Living Forest originated from Edenia, and it used to be called the Laughing Forest, as the trees were very jolly and full of mirth.
  It's not until Shaolin Monks that you can actually feed people to the trees. Other than that, this is just a creepy atmosphere, which would probably not be disturbing to the game's audience. And the Freeze-Frame Bonus is completely irrelevant.
• Baraka is a creepy-looking character, especially when he does his Mortal Kombat 2 victory pose when he turns to the screen, bows his head and looks up at the screen.
  Baraka is creepy, but not THAT creepy.

Mortal Kombat 3

• Kano rips your entire goddamn skeleton out instead of just your heart.
  That seems like it would Cross the Line Twice, making it much less scary than his original heart rip.
• Smoke, in one of his fatalities, kills himself. AND THE ENTIRE PLANET WITH HIM.
  '''Same as above, this is way too over-the-top to be taken seriously (especially since the game then moves on to the next fight as if nothing happened).
• Scorpion's fatality in ultimate. You're dragged into hell and beaten to horrific, off-screen death by a massive army of his clones. The "Psycho" Strings do not help.
  In a series which does not shy from showing brutal on-screen deaths, I doubt that anything that happens off-screen can count as scary.

Mortal Kombat: Armageddon

• Blaze's boss form◊ is very menacing, and is easily one of the largest and tallest characters in the game, along with Moloch and Onaga. Considering that he is a hulking Magma Man, it really begs the question as to how any kombatant would ever be able to challenge him and live, or even be able to punch him without having their skin melt right off.
  He does look powerful, but not scary, especially not by the series standard.

Mortal Kombat 11

• The Fatalities are no slouches in this entry, and the way the animations slow down and stop on the final blow only ups the pain factor.
  • Scorpion wraps his superheated spear's chain around his opponent vertically, then uses his teleporting powers to rip them in half.
  • Scorpion's second fatality harkens to MKX where he first burns out his opponent's midsection, then decapitates them and throwing his spear through the back of their head and out their mouth. The look of shock in his victim's eyes makes it all the more frightening.
  • It's not Sub-Zero without an assault on the spinal column, which he accomplishes this time by skewering his opponent upside-down on an ice clone's spear, then plunging his hand into their body and ripping it out with their head still attached.
  • Sub-Zero's other Fatality has him freeze his opponent's body, save for their head, which he lops off with an ice axe. Then to assert his superiority, he picks up his victim's disembodied head, freezes it over, then shatters it with a single punch.
  • Sonya calls in "air support", with a helicopter hovering above her opponent, then shoots her opponent into the air repeatedly until the chopper's blades make a smoothie out of her foe.
  • Baraka rips off the opponent's face, then the front of their skull. Then he tears out their brain and channels the spirit of Mileena by taking a big chomp out of it.
  • Skarlet forces blood out of her opponent, then hardens it into spears and plunges them into their body. One becomes lodged in their head, which she thrusts all the way through, spearing their eye in the process.
  • Not skimping out on brutal ways to kill her oppenents, Skarlet also can pump her blood right into her victim's heart, where it visibly changes color before it cannot take any more and explodes.
  • Geras punches his opponent twice, each time hard enough to leave massive holes in their chest. Then he teleports behind them and open-palm strikes them in the back of their head hard enough to send their brain flying out the front.
    This is every Fatality we currently know of. Baraka and Skarlet's are maybe gruesome enough to qualify, but the rest are pretty routine kills for MK.
• In lieu of the previous games' X-Ray Moves are Fatal Blows. You can only land them once per match, but boy do they hurt!
  • Scorpion: Sword slashes, daggers through the eyes, kick in the air, yank back down and kicks daggers into the skull before throwing opponent onto the ground, forcing daggers out the back of the head.
  • Sub-Zero: Slashes with two ice axes, kicks opponent down, third ice axe to the face, also used to life opponent into the air and slam them back down.
  • Baraka: Stab through torso with arm blade, second stab through skull, then runs opponent through with a war flag's staff.
  • Raiden: Staff strikes, thrusts spear through face, finish with gut stab.
  • Skarlet: Repeated stabs with dagger, slice from gut to neck, uses opponent's blood to make a scythe to skewer them with, finish with blood spear through the mouth.
  • Sonya Blade: No-Holds-Barred Beatdown, wrist blaster-empowered gut punch, riddles opponent with bullets from a sentry turret with a final shot to the face, finish with face stomp.
  • Geras: Uppercuts opponent into air, reverses time until they are back on the ground, multiple punches and sword slashes before punching them across the arena.
    This is also just every single Fatal Blow we've seen to date. They're all merely describing them without actually trying to make them sound scary to see.
• Brutalities are back, and just as brutal as before, if not moreso! So far, the only one shown is Scorpion knocking his opponent's head off.
  Actually, there are a few more known Brutalities. And they're not more brutal than in MKX. By MK standards, simply punching someone's head off is probably the least scary and most boring way to kill someone. None of the Brutalities shown in the video I linked to seem to be over-the-top enough to count either.