!![[Series/TheAvengers The British TV series]]
* Tara's situation in the climax of "The Curious Case of the Countless Clues": Steed phones her to warn her that two men are coming to kill her and that he's on his way, expect that Tara's in a wheelchair due to a busted up ankle and realises that her back door is unlocked. Desperate, she climes up her stairs to lock the door, and just in time too.

!![[Film/TheAvengers The Marvel Cinematic Universe film]]

* The scene in which Natasha interrogates Loki, and in an incredibly menacing speech, Loki punches his cell wall so hard it rattles, lists off all her sins, belittles her attempts at redemption, and ends by describing his plans for Clint, whom he has under MindControl.
-->'''Loki:''' [[FalseReassurance I wonít touch Barton.]] [[ToThePain Not until I make him kill you slowly, intimately, in every way he knows you fear.]] And then heíll wake [[MyGodWhatHaveIDone just long enough to see his good work]]. And when he screams, Iíll split his skull! This is my bargain, you ''mewling [[PoliticallyIncorrectVillain quim]]''!
** One of the more disturbing parts of the speech is how he starts off mocking Natasha and SHIELD, suggesting she's the "good cop." But as they talk, Loki seems to calm down a bit and actually talk to Natasha like a normal person, and almost seems to be empathizing with her when she talks about the "red in my ledger." Which makes his subsequent steady buildup into snarling, vicious rage, declaring Natasha's appeal to him to be "the basest sentimentality" and that she is "a child at prayer" sound less like a rant and more like the brutal judgment of an angry, vindictive ''god'' at her apparent willingness to betray her companions for one man.
* Loki's MindControl in general. Not only do his victims get creepy BlankWhiteEyes, they retain all their personality traits while under his control, creating a very unsettling effect, since most examples of mind control have the victim acting noticeably out of it. It's like an UncannyValley of mind control.
** Bonus points for the subtle implications that being unconscious undoes the MindControl, meaning that unless Loki was re-possessing them every morning, anyone under his control [[AndIMustScream was awake the entire time]]. [[FridgeBrilliance Which also explains]] why Clint looked more and more worn down every time we saw him: he hadn't slept for days; this in turn explains why Romanov was able to beat him in a fistfight in close quarters; although Hawkeye is more of a sniper than a boxer, he still has the better part of 50 or so pounds of muscle on Black Widow. Sleep Deprivation would slow him enough for Black Widow to beat him. It would also explain why Selvig speaks in such an overexcited way while under mind control, as if he's had too much caffeine.
** There's also the fact that unlike Hawkeye who's a bit dark even while good, Selvig is a 100% cheerful NiceGuy who is not only still friendly and sweet but genuinely excited about the amazing new science he's discovering... while under mind control and helping the enemy. It's like watching an innocent child doing evil unwittingly.
*** Hell, the creepiest thing about the change is where they ''don't'' seem to change. Physical wear and tear aside, their behavior is totally normal. Hawkeye's a capable badass who's smarter than he looks, and when he's mind controlled... he's a capable badass who's smarter than he looks, but his moral compass is completely skewed toward obeying Loki.
** Joss' commentary reveals that they added the eyes in post-production, and that the original script had no obvious signs of mind control. [[FromBadToWorse Somehow that's even creepier.]]
*** And if you don't believe it's worse, watch the deleted scenes where the eye effect was not added. The actors just ... stare. It's very, very unsettling.
* Natasha's leg is pinned under some debris... and then Bruce starts to groan and the real panic begins; the mere threat of the Hulk is the only thing that's made her show genuine fear in the film so far, and now she's trapped in an enclosed space while he's on the way. What makes it worse is that Bruce manages to give her an agonized look, powerless to stop what's coming, before he Hulks out ''practically right next to her''. (And also, as par for the course, the transformation looks ''extremely'' painful as he tries to fight it.) She manages to free herself before she gets squashed, but what follows is a nightmare chase that ends with her huddled in a dark walkway, very nearly whimpering with pain and shock. This is Black Widow, who beat up three men while tied to a chair and faced down Loki, and she's ''[[NotSoStoic traumatized]]''.
** Bruce becoming the Hulk in the above scene is bad enough, but the way he looks at Natasha right before the transformation is complete is absolutely horrifying because he knows what's happening and that there's a huge possibility that she's about to get hurt. And there's nothing he can do because it's too late.
** The Hulk might be an in universe example for Natasha, the mere prospect that Banner might turn has her pulling her gun on him and she looks ''terrified''. There's a good reason why she says, "Bozhe moi"[[note]]Translation: "My God."[[/note]] earlier when Coulson tells her she's getting the "big guy". And he doesn't mean [[Film/IronMan Stark]].
** In the scene mentioned above, things get worse. At one point, she thinks she's lost the Hulk, so she sneaks through, but then she turns and [[StealthHiBye the Hulk pops up]] and [[JumpScare roars at her]], resuming the chase.
** Imagine the above scene from Natasha's perspective: there is a creature twice your size, impervious to your bullets, and treats walls like they were tissue paper. ''And you're trying to outrun it with a busted ankle.''
** The tie-in prequel comic, ''Fury's Big Week'', reveals that Natasha may indeed have some sort of trauma of the Hulk:
--> '''Nick Fury:''' ''(coming across a very roughed up, and very upset, Natasha)'' Banner did that?
--> '''Black Widow:''' Yeah, a building he leveled.
--> '''Nick Fury:''' You need a doctor?
--> '''Black Widow:''' Maybe a psychiatrist.
* Hawkeye needs the eye scan of a certain man to open a door that holds a meteorite shard. He gives a hand held scanner to Loki, who proceeds to crash the guy's party, hold him down over a decorative slab in front of the terrified crowd, and - possibly not understanding precisely how the thing works, probably just for kicks - ''[[EyeScream ram the scanner right into the guy's eye]]''. [[NothingIsScarier We can't directly see the point of impact]], but on Hawkeye's end, the scan comes through ''and the eye is jerking around in death throes''. And when the camera cuts back to Loki, the device is making a loud mechanical whirring sound-- and the sound of human flesh being squished through.
** Also rather [[FridgeBrilliance appropriate imagery]] on Loki's side, as it looks like he's throwing his victim onto an altar to be sacrificed.
** ''The damn thing was spinning when he put it in!''
** Listen to the sound effects. ''There. Is. Squelching!''
** Here is some more horror for you, it was just his eye. There is no indication that Loki killed him with that device... he was more than likely still alive after Loki was done with him!
* TheReveal of [[spoiler: ComicBook/{{Thanos}}... [[OneSceneWonder Two shots of him in the whole movie.]] [[TheVoiceless Not one line of dialogue.]] More than enough to crap your pants.]]
** If you have no idea who he is, the "''challenge accepted''" look on his face is unsettling enough. It's even worse if you ''do''. [[spoiler:He's Death's ''literal'' StalkerWithACrush.]]
** The Other shit-talks ''Loki'' (as seen below). It is the master of an entire army of alien invaders. And when [[spoiler:Thanos]] stands up, it ''recoils''.
* One of Captain America's flashbacks while he's attacking the punch-bag has him recalling a scientist exclaiming he's still alive over his ''still half frozen'' body, implying he was conscious for at least some of his defrosting.
** Or, even worse, [[AndIMustScream during some of the time that he was frozen]].
* Tony's panicked yelps when he gets caught in the propeller. It's disturbing enough that he gets caught under a propeller, but unlike the previous [[Film/IronMan two]] [[Film/IronMan2 movies]], where his screams or cries have been mostly "uh-oh, that didn't go to well at all", here it's more like "shit, I'm going to get fucking eviscerated".
* The very concept of Loki as a villain. Imagine you're fighting an enemy who you know is insane and desperate. You have him locked up, but there's ''still'' something not right - it's almost as if he ''wants'' you to keep him locked up. Slowly, subtly, he starts messing with your head. ''Are'' you still human? ''Can'' you be redeemed? He begins to tear at the seams of the only group capable to stop him, getting into your head. The worst part is that, short of manipulating him right back (which is ''incredibly'' difficult), ''you can't stop him from doing it.'' He's mentally disturbed, nigh-on impossible to kill, and you may not even realize that he's tearing you apart until it's too late.
** Even worse is that he is clearly holding back. Even if you do not know his true origins from ''Film/{{Thor}}'', just knowing he is an Asgardian should make all his actions scarier. Even a "''weak''" Asgardian is still an Asgardian! Look at how Thor is able to handle himself against The Hulk. Now add to that pure power a mind capable of coming up with whatever plan Loki is ''really'' cooking up, and then the fact that that mind seems to also be broken?! Loki is pure terror in Asgardian form.
* When Tony gets back to Stark Tower and Loki, the god who [[spoiler:[[HeroKiller already killed at least one of his friends]]]], is there. Tony's alone, his armor is damaged too badly to use, and the others won't be there for a few minutes yet. He goes in anyway and banters coolly, but the second Loki approaches him with the scepter, just for a second, you see Tony's bravado slip badly, and you realize then just how scared he really is. It just sends shivers up your spine to imagine being in that position. [[spoiler:Good thing he's got an arc reactor on his chest, though.]]
* The "cage" Loki is placed in. Manages to hit both claustrophobia (nigh-unbreakable enclosed space) ''and'' acrophobia (designed to be dropped ''30,000 feet'') triggers. There's also a side of FridgeHorror in Bruce Banner's ''total lack of surprise'' when Loki mentions the cage was originally designed to contain the Hulk, like he's just resigned to the fact that his "curse" justifies such extreme precautions.
** Remember that the Helicarrier travels on water, too... what would happen if the Hulk was in it and hulked out while it was on the water? Dropped into the ocean, dark, cold, listening to the cage creak as the water pressure built, until...
* The Other threatening Loki. Loki's become quite the hardcore villain since we've last seen him, killing SHIELD agents left and right, mind-controlling people, mind-raping, and doing battle with some pretty tough opponents. And yet that, dear audience, is ''fear'' in his eyes, on his face, when the Other whispers into his ear:
-->"''If you fail, if the Tesseract is kept from us, there will be no realm, no barren moon, no crevice where we '''can't find you'''. You think you know pain? [[{{Thanos}} He]] will make you long for '''[[FateWorseThanDeath something sweet as pain]]'''.''"
** And worse still, as the Other is saying that last line, his hand slowly comes up from behind Loki's head, before pressing against the side of his face... then the ''moment'' he says 'pain', there's a combination of a burst of light, and Loki's head jerking away. The heavy implication being that the Other '''snapped his holoprojection's neck...''' ''and Loki felt enough that his real body reacted to it.''
* The [[KubrickStare first]] [[PsychoticSmirk look]] we get of Loki. It's this extremely disturbing look in his eyes and a SlasherSmile terrifyingly similar to the profile picture for NightmareFuel. [[http://oi47.tinypic.com/34h6j4l.jpg Take a look.]]
** His audible, slow breathing.
** And lest we forget the look in his eyes as he [[SherlockScan coolly calculates everything about his location in a matter of seconds]] and begins taking out the threats to him in rapid fashion. Seconds... mere seconds. A mind as broken as his appears to be, and he is still able to think through a situation that tactically.
** Made worse in the next angled shot where we see he's got [[http://imgur.com/uml1M3Q huge, bruise-like rings around his eyes]]. What did that time in the Void ''do'' to him?

!![[Comicbook/TheAvengers The comics]]
* Being replaced by a Skrull. You can come back years later and everything you know has changed. Your friends and people you have dated might be dead. The Skrulls don't just steal someone's image, they steal their entire lives, sometimes ruining them in the process.
** Mockingbird and Spider-Woman's experience are particularly terrifying because, not only was Mockingbird gone for three years, she was hunted by Skrulls after she saw through their tricks, with one of them impersonating Clint while he hunted her. She eventually snapped and killed him. Spider-Woman came back to discover that nobody trusted her after Veranke used her face.