In Burning Black: A Raven's Mourning Tears, Remy goes into a fit of this after Timothy reveals he's partnered with Wanda. He's described as 'babbling incoherently' and 'frothing at the mouth ... in disbelief, incomprehension and utter hatred...'. It's so bad, he doesn't snap out of it until late the next day.
In Harry Potter and the Methods of Rationality, Harry drinks Comed-Tea, which guarantees a Spit Take for whoever drinks it. Testing it out, Harry drinks it, and immediately catches sight of an issue of the Quibbler, which proudly declares "BOY-WHO-LIVED GETS DRACO MALFOY PREGNANT!" Cue Spit Take. Harry and Malfoy are reduced to "Buh-buh-buh-buh..."
Too many competing objections, that was the problem. Every time Harry tried to say "But we're only eleven!" the objection "But men can't get pregnant!" demanded first priority and was then run over by "But there's nothing between us, really!"
Snape when he finds out about Harry dabbling in the Dark Arts in Pet Project.
An old prospector in Make a Wish when Harry asks why he doesn't just sell his land to a certain developer and find a new place to live, later described by a shopkeeper as "old west gibberish."
I was born here, an' I was raised here, and dad gum it, I am gonna die here, an' no sidewindin' bushwhackin' hornswagglin' cracker croaker is gonna rouin me bishen cutter.
Advice and Trust: In chapter 4 the trope is mentioned by name. Asuka is trying to explain Rei that she can not let Shinji see her naked without telling the main reason (she and Shinji have got together, but they are keeping it a secret). The frustration of being unable to clearly express her primary motive is getting so strong that she "descends into Angrish".
"Pleasant or not, you can't just let baka-Shinji or anyone here see you naked like that." Rei tilted her head to the side by a tiny degree. "I don't mind if Ikari-kun sees me naked." 'Oh no you do not, you little blue-haired bitch! He's MINE!' "You can't do that with Shinji! He's... 'MINE! Just for me! Taken! Claimed! In love with me! GAAAAGHH! I can't say any of that!' "He's... not... you... WHARRGAGBBL!" "I do not understand," Rei said after Asuka descended into Angrish for a minute.
Evangelion 303: In chapter 12, an exceptionally furious Asuka gave the next example: "HRGGGG..."
Nobody Dies: It's possible to tell that Ikari Yui is truly furious when she starts making up words. (Her daughter Kei believes that these are the vilest epithets in the Japanese language.)
Very early in With Strings Attached, Ringo is panting heavily, frightened out of his mind, embracing Paul, and angry at George; he spouts: "You're - I'm - glad - can't - George - asshole - he won't - ".