Atop the Fourth Wall: Linkara provides the below quote in his review of Neutro one when it is revealed that the two scientists that assembled Neutro are testing his capabilities by, among other things, demolishing entire cities. He is understandably appalled.
Linkara: He's... They're... They're... They're testing Neutro by blowing up cities!?
Also seen in his mute review (he'd yelled at it so much while watching that he lost his voice) of The Good Son, where he holds up a sign that reads "INAUDIBLE RAGE". Let's not forget the part where he started yelling in sound clips of random violence.
Later, when co-reviewing Superman IV: The Quest for Peace with Linkara, and making a harsh criticism of the latter's special effects, Linkara merely has to say the three words "Bat Credit Card" to get revenge, by sending him off on a murderous gun-toting rampage.
Lampshaded in the AVGN and NC review of Ninja Turtles: Coming Out Of Their Shells in which the Nerd points out that he's too angry to make a coherent description as to how ugly Splinter looks in the special.
None of these have anything on the Critic's reaction to the end of The Neverending Story 3. While laughing bemusedly, he gets up, goes to his car, drives to Home Depot, returns to his car with a crowbar, drives back, takes the DVD to his basement...and then proceeds to go absolutely apeshit on it for several minutes.
Near the end of his review of The Room, he descends into incoherent gibberish when Lisa upon seeing Johnny's corpse after he shot himself in the head asks the incredibly stupid question " Is he dead?"
And even THAT is eclipsed by his reaction to the plot twist of The Secret of NIMH 2. He actually loses the ability to speak and is at a complete and utter loss on how to react at the sheer idiocy of Timmy's brother being in charge of NIMH, having turned the scientists into dogs, and becoming pants crappingly insane. He goes through so many bewildered expressions, Flat Whats, and just general speechlessness that you can practically see his brain shut down. Hell, at the end of the review he USES THE FREAKING DEATH STAR TO BLOW THE MOVIE TO HELL!!!
In his review of The Magic Voyage, the Critic begins by insanely squeaking out "it never stops", "it just keeps going", and some random gibberish before blowing fire out of his mouth. The scene cuts to a shot of the words "One Moment Please..." accompanied by a picture of the Critic gorging himself on meds.
From the SECOND Animated Titanic movie. "What next your going to tell me an iceberg didn't destroy the Titanic, it was an eeeevil gang of underwater sharks working with the whalers." *exactly that happens* *stunned silence, mouth wide open* "Excuse me I need to drop something." *fills glass with water, holds it put to the side and drops it all while maintaining his shocked look* "Wha wit the but cha wit de what is wrong with you!?"
Critic: [stomp stomp stomp] This movie...duuuuugh...[stomp stomp stomp] I mean it...daaaaagh!...it's really...FUCKETY FUCK-FUCK!
In Doug Walker's retrospective of the eleven worst movies he'd reviewed as the Critic, the remake of The Haunting causes him to dissolve into shouting random vulgarities. That was only at #10 on a list of 11.
Then there was this, a takedown to someone making, from Lindsay's point of view, poorly thought out complaints about Frozen, which gave us the line "WHAT EVEN THE FUCK how did this person movie?"
Todd in the Shadows got his turn during his review of Chris Brown's "Turn Up the Music", spouting furious gibberish multiple times, followed by wrapping up the review with an endless chain of censor bleeps.
In his review of "Break Up" (which was made before he even reached Channel Awesome), he made a noise that can probably best be rendered as "GHRRRRLRRRUUUUUUGHHHH".
Suffice to say, it's a pretty safe bet to assume every single Channel Awesome producer has dissolved into inexpressible rage at some point in their careers.
In his review of Eiken, The Necro Critic gets so fed up with the "awkward groping" running gag, that near the end of the video, he completely loses it and starts yelling insane gibberish before repeatedly screaming the word "PAIN" and having to be sedated off-screen.
The eragon-sporkings lapsed into this after a particularly bad piece of Moral Dissonance from Eragon — specifically, after he left two people to be eaten by the Raz'ac so that he'd know whether they were in the area, then after they were eaten assuaged his guilt by saying that they couldn't defend everyone. Then regained speech long enough for a rant including "MY HATRED FOR YOU SEETHES LIKE THE ROTTEN UNDERBELLY OF A BLOATED ZOMBIE CORPSE" before lapsing back into Angrish.
Mark Reads Twilight uses the head-smacked-on-the-keyboard kind of Angrish, especially in the first book's later chapters.
Book: "Bella." Edward's voice was very soft. Alice and Emmett looked out their windows. "If you let anything happen to yourself—anything at all—I'm holding you personally responsible. Do you understand that?"
Homestar Runner: Strong Bad frequently lapses into angrish for one reason or another. Compy Catalog is one of the funnier examples: Strong Bad's verbal meltdown as his brand-new computer suddenly suffers a BSOD (and not the heroic kind) is priceless.
mpn1990's review of Action 52. "Don't tell me this game just fucking crashed on me! OH MY GOD! (unintelligible bloodcurdling screams) DAMN YOU ACTION 52! GOD DAMN YOU TO FUCKING HELL! I CAN'T TAKE IT ANYMORE!"
Arkada from the DesuDesBrigade speaks in this at the end of his Ghost in the Shell: Stand Alone Complex review after he praises Mary Elizabeth McGlynn by saying that any anime she is involved is is gold. His captor the fanboy informs him that she also worked on Naruto and that, by extension, Arkada just praised it. Cue meltdown.
In the one where he plays The Impossible Game Level Pack: "These spikes will turn your ass into... *hits a spike* SWISS FUCKING CHEESE GODDAMNIT!!!
In the one for Balloon Guard: *after losing the ballon* GAVIN DICKIE BITCH FREE!!! (Gavin Free is a coworker at Rooster Teeth and one of the co-presenters of The Slow Mo Guys; he had recently defeated Micheal and most of the Achievement Hunter crew in a few multiplayer matchups)
In the Dark Souls video, he eventually goes off on some semi-coherent tangent about sunshine and sprinkles.
MSF High Forum: The Librarian also got the border of this, but it was instead represented by Shatner speech.
There was also one incident where a player was talking with Mitch, and his internet connection failed. It didn't return until several minutes later, at which time he proceeded to let loose with several pages worth of this. His furious typing actually damaged the keyboard. Mitch found it to be epic.
The Engineer also qualifies; he's almost always unintelligible; the most intelligible things he says are insults, profanities, and cries of dismay, and they're still gibberish.
The Spoony Experiment: Spoony lapses into this during his review of Ultima IX, specifically when he discovers that the Avatar doesn't know what the Codex of Ultimate Wisdom is- even though it was mentioned and referred to throughout the previous games and was even a central plot device in both Ultima IV and Ultima VI. For added frustration points, bear in mind that in the first of the two games, the Avatar had to retrieve the Codex and claim it for the religion he'd become The Chosen One of, and in the second, the same event resulted in a holy war that the Avatar spent the entire game trying to end.
AAAAAAAAAAAAAAAAAAAAAAAAAARRRRGH! The Avatar has to ask what the fucking Codex- No! NO! No, it's- it's... do I even have explain in how many- I can't, I can't explain how i... it's the thesis of the whole... I can't. This is what I'm dealing with. THIS IS LIKE THE POPE ASKING WHAT THE FUCKING BIBLE IS!
The Game Grumps lapse into this frequently. Jon tends to use it more often than Arin.
Jon has been known to slip into it on occasion in his own videos as well - one particularly memorable moment coming from his Star Fox Adventures review.
I'VE HAD IT! I'VE HAD IT I CAN'T TAKE IT ANY MORE! IF ONE MORE FUCKING WOOLLY MAMMOTH ASKS ME TO PICK UP A HSOLPAKOLAJHBWEFPLUH
Have you ever seen Tobuscus play Happy Wheels? Half the show is that. Especialy in the earlier episodes, where half of his speech was just him shouting "GOD DANGIT!" at various volumes and a "FPFFFF" sound in place of where curse words should go.
In Reviewing is Magic 4, it's implied that AnthonyC devolved into this during the "Technical Difficulties" scene during "Reviewing is Magic 4", when Luna, after having been absent for the entire conflict, casually asks "Did I miss anything?"
Used so very much by the sporkers of Das Sporking. Some use it with more frequency than others, though the really undecipherable rants show that things just got very serious.
The Posse (medibot, pokecapn, My Name Is Kaz, and Kung-Fu Jesus) all have had moments were they were so overcome with anger that they lost the capacity for words.
medibot: *gasping over Carrie's refusal to land in the correct spot during Kirby's Epic Yarn* My bones have turned into air!
Markiplier gets a lot of these when a game causes him frustration instead of terror. Perhaps his best one was in the course of playing Slender: The Arrival, when Ol' Slendy comes out of nowhere just as he's about to get to a checkpoint, undoing all his hard work again. He devolves into semi-coherent rage and hilarious angry Kermit-style flailing, and at one point starts unintentionally dancing on the face-cam.
"I'm so mad I'm doing the robot!"
SF Debris: during "These Are The Voyages", Chuck is so astounded to learn that Tucker learned his engineering from boats that he babbles incoherent nonsense interspersed with repeated use of one coherent word, specifically, "what?!"
This phenomenon is actually lampshaded in one Zero Punctuation video, where Yahtzee says that the combat made him yell things that were meant to be vulgarities but didn't quite get there, such as "Fugbar!" and "Daygunt!"