Dragon Ball Z: Gohan. Though suffice to say, nearly every Saiyan character qualifies at one point or another. But Gohan is the outlier, because his potential since the beginning was defined as Unstoppable Rage.
Goku's first Super Saiyan transformation also qualifies. He's out of power, then has to watch Piccolo, his rival and valuable ally at the time, and his best friend, Krillin, both get attacked by Frieza, with Krillin murdered outright — and then, just to be even more of a monster than he already is, Frieza just has to threaten little Gohan as well. This pushes Goku over the edge.
Broly, the Legendary Super Saiyan, with a legendary hatred of Goku to match. If you so much as look like Goku and you're in Broly's vicinity, run.
Sonic X in its third season had the eponymous character Sonic at one point absorb negative energies from fake Chaos Emeralds which unleashed when he became angry upon seeing his friends badly beaten and at risk of execution. The resultant fight involved him beating the everloving crap out of two robots specifically designed to be difficult to defeat. His long-time nemesis, Dr. Robotnik/Eggman, convinces him to stop his rage.
Starscream in the Unicron Trilogy get a couple of these. The first time occurred in "Transformers Armada" after learning that Megatron was plotting to terminate him and replace him with Thrust as the deception's second in command. He got pissed off, powered up, and defeated most of the other Decepticons and defect to the Autobots (for a while). 20 years later in "Transformers Cybertron", he does it again, this time, to the Autobots. He had just betrayed Megatron (again) and has finally obtained an army of his own. What does he do when the Autobots came for the cyberplanet keys and the omega lock? He goes on a foe-charging attack and defeat and/or almost killed several Autobots. Damn...
Naruto has the Nine-Tailed Fox form that Naruto engages during instances of extreme emotional disturbance. The first time is when Sasuke defends him from Haku's lethal technique, followed by several later instances when Naruto is angered. The Rage will inevitably cause Naruto's lifespan to be shortened, due to his constantly dying/regenerating cells while the form is active). Also, if Naruto completely loses it, the Fox will take possession of his body. No longer need to worry about it since he has full control over Kurama.
Orochimaru invokes this trope. And boy does he not learn his lesson.
For Code Geass, with all a lot of characters being over-protective of another, this happens a number of times. Suzaku stands out particularly, despite being two-thirds pacifist and displaying warrior-like grace, the moment when he witnesses Euphy being shot causes him to go berserk, charging through the battlefield and through two mechas that posed a serious threat to him in order to rescue Princess Euphemia following which he abandons the battle entirely. This later seemingly pushes him past his Despair Event Horizon.
Ranma ˝: A more comedic use of the trope, if Ranma's fear of cats reaches a critical point (especially when surrounded by them and unable to get away), his mental state becomes like that of a cat. He can only use the Neko-ken (cat fist) when in this state, which manifests as an increase in speed and agility, and the ability to attack enemies (or anything else that annoys him) with invisible claws sharp enough to slice through seemingly anything. But with his mind and personality those of a common cat, this also becomes an example of Sanity Has Advantages: Ranma is distractable, unfocused and generally stupid in this mode, meaning that he can be outthought fairly easily. In this state, Akane finds herself the Kid with the Leash, as Ranma will joyfully savage his/her own Jerk Ass father without a second thought, but he curls up with her like a happy kitten, even though he is insistent that She Is Not My Girlfriend.
In Princess Mononoke, this happens to Nago and almost to Okkoto, who are rhinoceros-sized wild boars to begin with. Their rage comes from their whole tribes being slaughtered by humans and only ends when they are killed.
Subverted in Eyeshield 21 numerous times, such as when Tetsuma charges at Gaou after he severely injures Kid and is still soundly defeated.
In the finale of GaoGaiGar, after the final super Zonder's (Mikoto) barrier is weakened, you would expect Guy to wrap it up and finish the fight quickly. Instead, he completely brutalizes the Zonder, ripping off one of its wings, stomping on its head, punching its arms off. To top that off, he didn't even bother with Hell and Heaven, he just aimed at the core and ripped it out. All of this while screaming in anger.
In Mobile Fighter G Gundam, this is initially played straight with Domon Kasshu's Shining Gundam and its Super Mode. He even yells "Take this! My love, my anger, and all of my sorrow!". This is later subverted as he finds out this is the "imperfect" mode. His more powerful Hyper Mode can only be used when he is in a completely zen state of peace, calm, and focus.
See Mobile Suit Gundam SEED. See Kira get angry. See Kira go crazy, and completely disable all of his enemies in seconds.
That's not Kira angry. Go watch the episode where He and Athrun succumb to their rage and try to kill one another. Both of them convey their rage very well with the sheer brutality of their attacks. No more hesitation, no more clever tricks. Their minds are set on the same part of the dial: "Two men enter, one man leaves."
In Gundam Wing, Heero enters an Unstoppable Rage during his first use of the Gundam Epyon because of the ZERO System's side effects.
Setsuna F. Seiei from Gundam 00 generally keeps very good control of himself if he gets mad, but he does have one case of pure rage: during the intervention in Azodistan, he witnesses a scene that reminds him of the horrific war he participated in as a child, which causes him to snap and go completely ballistic on the attacking Suits. Most of the time, in Gundam 00, blind rage = quick death for pilots, be they flying a Gundam or not.
A slight variation on this would be Allelujah Haptism. Normally, he's a calm, calculated Gundam Pilot, and generally the most relaxed of the bunch (for example, he never once fought any of the Gundam Throne Units, at least not on-screen, and didn't even seem to give a damn about their activities, even when he other Gundam Pilots went to fight them. Earlier, he also endangered the entire mission just to save some civilians while HRL-backup troops arrived). However, his calm only lasts until someone else capable of using Quantum Brainwaves gets too close, especially HRL Ace Pilot Soma Peries. Then his psychotic alter ego takes over and brutally slaughters everything in sight that doesn't get away. Finally, by the end of Season 2, he learns to actually control this, which is heavily exploited during the Movie, not limited to having 2 Super Soldiers with 3 personalities in total piloting 1 mech that gets stronger because it's piloted by super soldiers.
After Decil kills Woolf Enneacle in Mobile Suit Gundam AGE, Asemu is driven to such rage that it cancels out Decil's Psychic Powers and he's unable to read Asemu's attack patterns. Decil is dead in very short order. Subverted by Flit in G1 (who only holds back because Decil was a young child at that time), and in G3 Kio subverts it after his friend Deen is killed by another Vagan because he pulls it back before actually striking the deathblow.
Fuyuki Hinata in the manga/anime Keroro Gunsou becomes so frightening when angry that all other characters shrink back in horror. It takes a very serious personal offence to rile him.
Neon Genesis Evangelion has Eva-01 going berserk against Angels multiple times to devastating effect, the most terrifying instance landing up with the Eva eating one of the angels, Shinji himself going berserk against Shamshel, and Asuka when she tears through the Mass Production Evas. In fact it's the soul of the pilot's mother inside the Eva that goes into an unstoppable rage whenever her child is in danger, and Asuka and her mom go berserk together.
Ayato Kamina from RahXephon seems to be quite capable of working himself into an unstoppable rage in combat. His common method of combat is very much the raging badass screaming his way into battle, and as a general rule, the second Ayato releases a soul-tearing scream of pure rage, the enemy Dolem is about to die.
The slightly relatedEngels and Tagers get a little irritated if you knock out their pilots, and Engels become enraged if the wrong pilot gets in the cockpit. During this state, they'll try to kill anything that looks remotely threatening that isn't of the same type of being. They don't gain strength or do more damage, but they make all skill rolls as if they had three points in each skill, and don't suffer wound penalties.
Chimchar in an episode of Pokémon. That was enough for Paul to try everything he could to bring out that power again.
After being knocked unconscious by Paul's Ursaring in a later battle, the true extent of Chimchar's power is unleashed and it needs a Cooldown Hug when it doesn't go back to normal. This unnatural power has been explained as its ability, Blaze.
Later on, after it's evolved into Monferno, it does this again, and requires another Cooldown Hug from Ash in order to calm down. Then it evolves into Infernape, after which it's able to control the Ability.
In the Sinnoh League Infernape once again activates Blaze, and it looks like he's going Super Saiyan while doing it.
Also seen with the Pokemon Mankey, and more so with its evolved form Primeape, which has a Hair-Trigger Temper and goes into an Unstoppable Rage at the drop of a hat.
But none of the above hold a candle to a pissed-off Mewtwo.
Yu-Gi-Oh! naturally turned this effect into a card, "Berserker Soul", and had it used by Yami Yugi during one of his own moments of Unstoppable Rage. "DORO! MONSUTAA KAADO!"
The full story: sometime after Yugi's soul is taken by the Orichalcos, Insector Haga (Weevil Underwood) taunts Yami by tearing up a card in front of him "as a joke", claiming Yugi's soul was in it and tearing it up erased him, and Yami completely loses it. Even worse for Haga: since a duel within the Seal is effectively a Shadow Game, he physically felt each and every blow Breaker dealt to him. The true chill-down-the-spine moment, however, comes shortly after he reveals his ruse:
Yami: Wash your neck and wait, Haga.
That order was traditionally given to prisoners before being executed, meaning Yami had gone past saying "I'm going to kick your ass" and issued a death sentence to Haga, which he then proceeded to carry out with brutal efficiency.
Berserk put it in the title, so it's a major part of the series.
A particularly notable example from the anime comes during the Griffith rescue arc, when Guts finds out just what had been done to Griffith. After holding him for a few moments with tears in his eyes, he smashes through a thick wooden door to take out the bastard who had tortured him, and then proceeds to live up to the name of the series by going on a rage-fueled killing spree on every last Midland guard standing between the Hawks and the way out. They don't call this guy the "Hundred Man Slayer" for nothing.
The Berserker Armour sends the wearer into a blood-lust incapable of distinguishing between friend and foe (and slowly robs them of their senses) but in return numbs pain (which tends to lead to crippling injuries) allows full use of a person's strength (again needing weeks of recovery as a result) and fixes broken bones (by jamming the bones in question full of metal shards).
It's generally not smart to get Wolfgang Grimmer of Monster angry. It's generally not survivable either.
In Elfen Lied, the main character Lucy is almost constantly in this state when she isn't in her alternate personality Nyu, due to a lifetime of almost constant abuse, deprivation, and trauma. Considering that her powers as a diclonius are a recipe for an all-out gorefest, triggering the Lucy persona may well be the last thing you ever do.
When the Major is beating the crap out of you with a stoic expression, she's actually just toying with you until you realize the futility of trying to fight her. If you somehow manage to really make her pissed, it will be very obvious, but you will probably never get the chance to fully comprehend what's happening to you. This woman's normal range of expression consists entirely of stoic and smiling politely. When her anger is showing, the point of reasoning with her is long over. And being a cyborg, she doesn't even care if she gets limbs torn off or her body crushed, making her truly unstoppable. The only two opponents who ever defeated her were inside Humongous Mecha, which she attacked bare handed.
In Slam Dunk, the first thing Heavy Sleeper Kaede Rukawa clearly says is "My name is Rukawa Kaede, I'm a freshman, and I will never forgive whoever wakes me up when I'm napping." Cue to him beating up the gangsters who woke him up from his nap.
Several players in The Prince of Tennis have a penchant for injuring their rivals during games. The most infamous ones are Akaya Kirihara from Rikkaidai, Jin Akutsu from Yamabuki and Kippei Tachibana from Fudomine. Subverted in Tachibana's case: after he seriously injures his best friend and teammate Chitose, he becomes The Atoner and refuses to use violent tennis anymore. Which makes him easy prey for Kirihara's Devil Mode later.
Fist of the North Star: People who piss off Kenshiro (usually by going too far in their cruelty to others) usually don't live to tell the tale. In fact, if they do, they're already dead. This is at least explained in the series by the fact that his fighting style is designed to increase in power proportional to exactly how angry he is. At normal levels of anger, he can break concrete with his fists. When he is at full power, he can make a tank explode by punching the driver.
If you're an Akuma, and you tick off Allen Walker of D.Gray-Man too much, you're likely to make his Innocence upgrade. Or you might make it angry. That would be a bad thing.
Think about it in this way: a permanent upgrade to his weapon will only hamper your goals in the long run, but if you get the weapon mad you will lose so much of your force, that the scales will probably balance.
Kazuya Ryuuzaki in Daimos is generally an all around nice guy, especially towards the Earthlings, and he tries to be good for some Not So Different aliens. But after seeing Miwa's racism towards innocent aliens too many times... he snaps, jumps dodging an attempted shot from Miwa and starts beating the crap out of him using Karate (thankfully on foot, rather than stomping him with the eponymous mecha) while screaming that Miwa was actually worse than the aliens (which is actually true). Kyoshiro and Nana managed to stop him after hearing that Miwa would be arrested for his crimes, but even after being restrained, Kazuya cannot stop to scream at them telling them to stop restraining him. This also gets taken to Super Robot Wars Advance, done with full amounts of awesome.
Both Takato and Guilmon of Digimon Tamers simultaneously go into an uncharacteristic rage upon the death of Juri's Leomon, with disastrous results. Guilmon and his evolutions even have a hazard symbol to hint that you really shouldn't piss him off.
In the very final chapter of Tekkaman Blade, Blade's brain breaks down completely because of his Deadly Upgrade. Right when it looks like we're all doomed, he suddenly lets out a roar and zips off to the moon to have a nice, dramatic final battle. Did he get better? Nah. It's just that a single aspect survived the complete destruction of his entire personhood - his rage toward the Radam for taking away his family. It really puts the "unstoppable" in Unstoppable Rage.
In Chrono Crusade, Chrono has moments when his Berserk Button is pressed where he taps into his demonic power and starts to attack indiscriminately. In one particularly bad moment of this, he sets part of a city ablaze and nearly kills Rosette because of the massive drain on her soul. Which sends him into a Heroic BSOD afterwards. A major key in the events leading up to the climax is Chrono learning to control his rage.
Princess Tutu has an example of this trope, but not in with the character you'd expect. Is it Fakir, who prides himself on being the Knight? Nope. Is it Mytho, the heroic Prince from a fairytale? Not him, either. It's actually Autor — a nerdy, Drosselmeyer-obsessed scholar. When Fakir's hands are nearly cut-off by the Bookman trying to stop the story, Autor flies into a rage and defeats the axe-wielding man using only his bare hands. Not nearly as impressive as some of the other examples on this page, and it only appears briefly, but it's still surprising considering the sort of character he's portrayed as.
In Hellsing, Zorin Blitz kills Pip as he tries to carry a blinded and severely wounded Seras to safety. He requests for Seras to drink his blood so "they can defeat them together" just before he dies. Filled with intense sadness which quickly becomes rage, Seras fulfills his last wish and her true vampiric abilities awaken. She then proceeds to go batshit insane and slaughters Zorin's mooks, and finally grinds Zorin's head on the wall like a cheese grater.
Also during the Valentine Brothers attack on the Headquarters.
Alexander Anderson from the series seems to fit this trope as well when he is in combat, typically demonstrating nothing but sheer joy at the prospect of battle. He attacks Integra, a high ranking British official who didn't even want to start a fight, head on, killing her bodyguards and decapitating one of them before threatening to paint to walls with her blood. He runs into gunfire without even trying to dodge and due to his augmentations is able to slaughter hundreds of undead mooks without any difficulty. In the TV version, at one point he gets both of his arms shot off. He simply kneels to the ground and grabs his knife with his teeth, and then proceeds to run at his opponent with it while he's still being shot at.
Alucard gets such a moment in Ultimate, after Anderson turns himself into a monster of God via Helena's Nail; he completely drops his Large Ham and Blood Knight antics and concentrates entirely on the battle.
Subverted? In a Shonen anime? Unnatural! But in Shaman King, rage clouds your mind, and causes you to squander your energy. It's specifically considered something to be avoided.
Demonstrated quite well in the Yoh vs. Faust VIII fight. Faust taunts and enrages Yoh from the start of the fight by harming Manta, and when Yoh is on his last legs, his last-ditch strategy is to punch Faust's Berserk Button as hard as he can. And it probably would have worked if Yoh had had just a little more furyoku to spare.
In Gintama: Not exactly conscious rage, per se, but it is brought about by rage. In her fight against Abuto, Kagura loses all control against her Yato instinct and flies into what can be fairly called an Unstoppable Rage - though the look on her face says she's actually enjoying it in a detached, psychotic way.
Busou Renkin has a good chunk of rage, with a Victorized Kazuki duking it out with Victor. There's also Tokiko, who pumps rage through her veins instead of blood.
In Tengen Toppa Gurren Lagann Simon flies into one in the middle of taking over the Dai-Gunzan when Kamina appears to have died. He then releases so much Spiral Energy that the whole ship starts to glow, blows all the Mooks out of the ship, and he sets off a nearby volcano. It took a whalloping from Kamina to get him out of it.
Full Metal Panic!: In episode 5, Sagara and Tsubaki really piss off the school janitor, who transforms in to a chainsaw-wielding monstrosity that easily fends off their combined attacks, swallows hand grenades, and chases them around the school like puppies.
Do not anger Luffy enough to make him take off his hat. God help you if you make Luffy take off his hat. How can you do this? Insult anyone's dreams, hurt his friends, mock anything to do with a pirate's pride, threaten anyone close to him...
Luffy:You think after everything you've done to my friend, and my sea, that I'm going to let you get away with all of this?!!
To put it in perspective, the character Luffy said that to had spent over twenty years developing his plan, and it was so far along that the only way it could fail is if he happened to blab too many of his secrets to someone who would oppose it, allow that someone to discover the remaining secrets, bring that someone to his home base, and refrain from killing that someone when he had the chance. But even if a someone was armed with all that, they would need to have an absurd amount of power to stop him. And who does he do that to except for the Straw Hat Pirates? And he made it infinitely worse by kidnapping their navigator whose meteorology skills are unrivaled in that world in order to remove the only possible threat to his plan. He learned the hard way that the unpredictable cyclones of the Grand Line were nothing when compared to the Straw Hats' Unstoppable Rage.
Tell Sanji that his chivalry is naive, that he can't protect anyone, mock his status as a chef, waste food or insult a beautiful lady in his presence. For maximum effect, do all of the above at the same time.
Although this could also go under Tranquil Fury, there's also Whitebeard in the War of the Best, where after everyone witnesses Ace's death and despite sustaining heavy injuries from being shot, stabbed, slashed, burned and having half his face melted off, he defeats Akainu in 2 hits, the second hit destroying most of Marineford and separating the pirates and Marines with a giant chasm. In short, never, ever piss the old man off.
Recap of the past few Big Bads. Number 1: Arlong. Killed Nami's mother and enslaved her and her home island. Promised to free them if Nami paid him a hefty amount of money. Utilized Loophole Abuse to ensure she doesn't get the amount after eight years of hard, hard work. Mocked her and provoked her entire village to attack him in what would inevitably be a Curb-Stomp Battle with everyone she loved ending up dead. The culmination of this? Nami bursts into tears, and asks Luffy for help. He and his other three crew mates march off to Arlong Park, and a couple of hours later, Arlong is unconscious and half-dead beneath the rubble of what used to be his base, and all of his henchmen aren't much better off.
Then we have Enies Lobby. Renowned as the World Goverment's Judicial Island and one of their three centers of power, the place has 10,000 soldiers and a group of superhuman assassins to ensure that any criminals taken there are beyond all hope of saving. The assassins, CP9, forced one of the Straw Hats to join them there on penalty of having the rest of them obliterated. When the other Straw Hats found out, they defied all odds and invaded Enies Lobby. For centuries, the place stood as a stronghold, symbolizing the World Government's power and authority. In the space of a single night, the Straw Hats' invasion transformed it into a burning, ruined wasteland. And as if that wasn't bad enough, someone happened to press the Marines' Panic Button: the Buster Call. Basically, requesting a Buster Call is roughly analogous to requesting a nuking from orbit. It's only the second time in known history the Buster Call is used. It didn't take. Luffy and company mauled the Marines sent to annihilate them and got away.
Most people who made the mistake of challenging the Straw Hats provoked their Unstoppable Rage and were unable to prevent the consequences, to the point that after the Time Skip, Donquixote Doflamingo, one of the most powerful pirates in the world, The Don of the entire New World, and a guy with connections to the World Government in the highest possible places, is Genre Savvy enough to know that he needs to refrain from underestimating them.
But in the end, he's just too confident in his resources and power, and by the time he realizes that he did underestimate the Straw Hats, perhaps even more than anyone previously, they've already caused too much damage, and it doesn't take long at all before they force him to take very drastic measures…
Roberta from Black Lagoon normally spends her days as a bad maid, but if you kidnap or kill her masters, she will hunt you down through single photographs and kill you. You have a slight chance of surviving if you are a member of the Green Berets, otherwise you are dead.
Shortly after Kiyomaro of Zatch Bell! comes Back from the Dead and completely wipes the floor with his opponents, one of them taunts Kiyomaro with mention of his fallen allies and receives an epic beating with epic use of Demon Head on Kiyomaro's part.
Miu gets this when she finds her friends badly beaten by Shou Kanou during the D of D arc in History's Strongest Disciple Kenichi. How does Kenichi snap her out of it? By groping her chest. Which was apparently a technique that Ma Kensei taught him.
Bado from Dogs: Bullets & Carnage goes into Unstoppable Rage whenever he has a nicotine fit and can't find cigarettes.
In the earlier parts of the manga, pushing Ichigo too far was an invitation for his Inner Hollow to come out and play. Eventually, he's driven into an unstoppable form of pure instinct as a result of Orihime being left vulnerable to Ulquiorra. This results in both Ulquiorra and Ishida (who tries to calm Ichigo down) to take the full brunt of Ichigo's state.
When Captain Aizen appears to have been murdered, it's Hinamori who finds the body. Convinced the grinning Gin is the culprit she flies into an Unstoppable Rage, causing one of her best friends, Kira (Gin's Number Two) to step in to defend his captain. Even then, Hinamori won't stop, calm down or see reason and it takes the intervention of another captain to get the situation back under control (by arresting both Hinamori and Kira).
Edward in Fullmetal Alchemist goes into one of these when he finds that Shou Tucker, an alchemist famous for making chimeras, turned his own wife into one, and then later turned his daughter and his dog into one. Shou makes it worse however, by provoking Edward about the use of human lives, and saying that they aren't so different, leading Edward to continually scream "YOU'RE WRONG!", whilst punching him repeatedly. Ouch.
When Al sacrifices himself to give Ed his arm back, Ed goes berserk on Father Homunculus.
Al almost does this too.
Alphonse: "Mister Tucker, one more word out of you... and I'll be the one to snap."
Riza also goes into Unstoppable Rage when she thinks Lust managed to kill Mustang, and promptly empties her gun's magazine into her, reloads and repeats. Several times. Worth noting because it is a subversion rather than a straight portrayal, as when she's run out of bullets, she collapses and cries, while Lust gets back up after shrugging off the barrage without breaking a sweat.
When Mustang finally finds out that Envy killed Hughes.
Roy Mustang: "That's that... you killed Hughes..... that's all I needed to know... You don't need to say anything more, Envy. The first thing I'm gonna turn to ash is your tongue."
He makes damn good on this promise, He then proceeds to alternate between full, body-consuming explosions, and pinpoint attacks that target the most sensitive and painful areas, notably the eyes. Repeatedly. OUCH!
Notably averted, however, with the Homunculus Wrath. Despite being a ruthless fighter, he is always calm and composed in a fight.
Father as well in the Final Battle he shows much anger
Ed invokes this in his initial battle with Ling Yao's bodyguard Lan Fan. The twist is that he drives Lan Fan into an Unstoppable Rage by insulting Ling, causing her attacks to become wild and reckless, and therefore much easier to dodge and counter.
One: Do not mess with Senri's friends. Two: Do not remove Senri's eyepatch. Three: When white hair appears on his forehead (after you have ignored number two), you run away as quickly as possible, through that really isn't going to help, you're going to be clawed to bits anyway. Even if +Anima is a children's manga, it doesn't skimp on the violence when necessary.
You get to see Senri go into an Unstoppable Rage two times. Once while he is a young child, and the other time he's in Moss Mountain with Cooro, Nana, and Husky.
In the final episode of Death Note, when Light Yagami is exposed as Kira, Touta Matsuda slumps to the floorunder the weight of it all, but springs into action faster than anyone else when Light attempts to escape by murdering everyone with the Death Note piece in his watch. Matsuda then shoots him in the hand, with Manly Tears coming down as he calls Light out on leading his father (and Matsuda's Obi Wan) to slaughter for nothing. When Light tries to convince Matsuda that the only way to make Soichiro's justice worth it is to save Light and kill the SPK and investigation team, he's only more enraged, and snaps when Light once again tries to write names in the note fragment with his own blood. He shoots him multiple times, and tries to finish him off with a shot to the head, but is held back by the other members of the investigation team. Coupled with the fact that he was the only member of the team to have any doubts about whether Kira really was evil, Matsuda's Crouching Moron, Hidden Badass moment is even more impressive.
Matsuda:"I have to kill him! HE HAS TO DIE!"
Katekyo Hitman Reborn!: Averted when the berserk rage is only powerful for five minutes and it is in itself not unbeatable. Tsuna is at his best when he is on the other side, straight past normal, straight past calm, all the way onto the other side where he is completely empty of feeling and is thus at his most level of head. Results in loads of arse kicking. But... there comes the time when he just has to lose it for a moment, and that's when he kinda hit Byakuran with an X-burner so hard that Byakuran vaporized. Scary...
The otherwise peaceful and docile Ohmu of Nausicaä of the Valley of the Wind fly into an Unstoppable Rage if the Sea of Decay or any of its insects are harmed, killing and destroying everything in their path in an attempt to claim vengeance against whatever is responsible. In the manga, we're privy to their thoughts through Nausicaa's empathic link with them, and they seem to regret their actions once they regain their senses.
Nausicaa herself flies into a rage and annihilates a roomful of trained soldiers with just a staff.
The Nodos in Heroic Age are Nigh InvulnerableKaiju possessed of incredible destructive power to begin with, but under certain circumstances (such as when more than two at a time are engaged in a fight) they can go into "frenzy" (or "madness" or "mental chaos", depending on the translation), becoming even more monstrous and destructive. The Heroic Tribe apparently destroyed several entire star systems through such rages during their civil war, hence why the Golden Tribe sealed the survivors within members of other tribes, making them slaves to these "lesser" beings.
Ivan Isaac's superpower in Priest is his sheer rage and contempt for Temozarela. He doesn't even care whether or not he wins against him, he just wants Temozarela to see how angry he is.
Hajime No Ippo: Don't make Takeshi Sendo angry while in the ring. You'll live longer. Shigeta and Ippo both have been victims of his flip-outs. It's not a nice situation to be in, really.
In his fight against Bryan Hawk, Takamura goes into a state of pure, uncontrolled rage (while half-unconscious to boot) and proceeds to beat the flying shit out of Hawk.
Subverted in Soul Eater. After spending 800 years waiting, having his boss/partner killed, and going so far in his revenge plot as to grow a second, back-up body,Giriko is all sorts of insane with rage. His limitless fury gives him such a power boost that Maka and Soul are quickly on the ropes. Unfortunately, he's built up so much rage that he overloads his soul. He rages so hard his soul explodes and he dies.
Sorcerer Hunters protagonist Carrot Glace suffers a unique combination of conditions. His body naturally absorbs any spell that hits him, and the energy from that spell transforms him into some nigh-unstoppable beast. The only two people who seem consistently able to snap him out of it are his coworkers and the two girls he normally avoids whenever he can: the Misu sisters, Chocolate and Tira.
After spending almost the entire second season as nothing but a hostage, Kojuro of Sengoku Basara escapes, and finds out that Hanbe, the jerk who had constantly tried to convince him that Masamune was dead, gave his lord a scar across his back. He is less than pleased about this. He promptly rides off without a sword , finds Hanbe's unit, and proceeds to beat all of the mooks bare handed. He then steals a sword, and goes berserk on Hanbe himself.
This is also Hanbe's protege, Mitsunari's, raison d'etre. Whoever may be on the receiving end of his anger, nothing is gonna get in his way until he hunts them down and chops them into mush.
In an episode of Halo Legends, Harka has the wife of Fal 'Chavamee, the original Arbiter, killed to provoke him into a duel after he refuses to serve the Covenant. Fal wipes out an elite hit-squad, hundreds of Covenant infantry, a Wraith and three gigantic Hunters before dying along with Harka in the eponymous duel.
In the second series of Beyblade, Kai has a major guilt-induced Heroic BSOD while fighting Goki, because Goki's Mind-Control Eyes reminds him of Wyatt, who is dead/insane depending on the version and it was Kai's fault. ("I can't fight you. Not you.") He snaps out of it on his own, but still isn't strong enough to take down uber!Cyber Dranzer. Then Goki refers to Wyatt as "your wimpy little friend" and, well. Dranzer hits Battle Aura and the title trope ensues.
More specifically, Natsu is the poster boy for this trope in-guild. His magic operates on the principle that it becomes stronger the angrier he is, and as such is often used as a "point, shoot and win" at several arc Big Bads.
In Trigun, Vash is normally a pacifist who refuses to kill anyone, trying his very best to non-lethally shoot at people (unrealistic, but for the context of the story one just has to roll with it) which puts him in bad situations with the major villains of the series who don't go down as easily as a normal person would from his non-lethal shots. On one notable occasion, the villain was unaffected by Vash's attempts to non-lethally defeat him but when he murdered a lot of people right in front of Vash's eyes Vash pulls out his machine gun arm and quickly immobilizes the villain. In his weakened state, Vash knows the villain can't fight back but in his rage he seriously considers killing him. However, he holds true to his morals and lets him go. This shows you that Vash would be an unstoppable gunfighter if he went in for the kill from the start.
In the Megaman NT Warrior manga, Megaman's Super Mode starts out as this until he learns to control it. Another example comes a few chapters later when Shademan threatens Lan. Megaman rips him apart.
In Vinland Saga Canute has a divine revelation that transforms him from a frightened sissy into an incredibly charismatic and powerful leader. And the very first thing he does is to calm down a raging berserker four times the size, that is about to crush him, with a Cooldown Hug. After that, he only has to look at people to make them worship him.
In Blue Exorcist, Rin has some... problems with restraint once he draws his sword to transform into his demonic form. This was especially visible in his fight against Amaimon in the anime as he started off as a bit angrier version of himself but ended up as a snarling and growling bundle of Ax-Crazy, behaving more like a feral dog than a human. Right in front of his True Companions who up until that point thought he was a Badass Normal and definitely not the son ofSatan himself. Good thing Shiemi was on-hand for a Cooldown Hug, otherwise it would've gotten real ugly real quick.
Higurashi no Naku Koro ni: Somewhat of a subversion in that those who perform these are usually quite unstable and sometimes presented more darkly than a standard hero, but standard procedure in most arcs nonetheless. Basically, if you harm Satoko, or don't believe in Oyashiro-sama, or if a certain Yandere thinks you're connected to her boyfriend's disappearance, you're bound to be on the receiving end of one eventually. Doesn't help that the local Hate Plague that makes people prone to dish this out in the first place seems to give them enhanced strength and senses.
Fruits Basket: BlackHaru is essentially Unstoppable Rage incarnate. Most of the time he's content to just taunt or beat up whatever poor soul rouses his ire, but when he discovers that Akito threw Rin out a second-story window, he goes into aTranquil Fury until he reaches the Sohma estate, then tries to kill Akito. It takes all of Akito's considerable powers of persuasion to stop him.
Eren Yeager, the protagonist of Attack on Titan, runs on this when he's in Titan form. It's absolutely terrifying, even to battle-hardened soldiers and fellow Titan Shifters.
Eren Yeager seems to be in a near-perpetual state of rage - the only difference when he's in titan form is that the 'unstoppable' part finally comes into play. The rest of the time, his anger tends to make him more of a clumsy Leeroy Jenkins than an actual threat.
Ryuko Matoi of Kill la Kill has never been the calmest girl of Honnouji Academy, but when Nui Harime pulls out the other half of the Scissor Blade Ryuko always carries and reveals herself to be the one who murdered her father, Ryuko. Goes. Fucking. BERSERK. Her rage burns so hot that Senketsu loses control due to Ryuko's blood literally boiling in her veins, resulting in Senketsu consuming her, turning her into a monstrous form.
In Marvel's World War Hulk storyline, he's busy with a particularly Unstoppable Rage, mopping the floor with everyone in his way. The truly frightening thing was that he had gone into Tranquil Fury at the same time, leaving him with enough mind to keep his head and employ strategy and trickery.
This is also one of Wolverine's defining traits. He's usually composed and calculating when he fights, but when he's pushed beyond a breaking point, he gives in to his animal instincts and his fighting style becomes more erratic and feral, and it's usually in these occasions where his body count rises the most.
Like father, like daughter. Do not attempt to hurt Wolverine or anyone else X-23 loves, or you'll be sent home in pieces. She's also seen blowing her top when confronted by former members of her dead former pimp's gang, who were continuing to traffic women. Being under the effects of the Trigger Scent takes this Up to Eleven, and she becomes a virtually unstoppable whirling ball of adamantium-bladed death that will tear apart everything in her path. In this state she's completely unable to distinguish friend from foe until it wears off, and yes, it has been used to make her hurt people she cares about.
Laura: The ones who made me, they made a chemical...a scent...when I smell it, everything goes black and when I wake up, everyone's dead.
If Hulk weren't the poster boy for this trope, the Red Lantern Corps in Green Lantern would be. Their rings are powered by their rage, which is strong enough to the point where all but their leader are mindless berserkers.
In the Hush storyline, Batman goes into one of these when it seems that The Joker killed his childhood friends. Flashing back through all the people the Joker's victimized and killed over the years (mostly Barbara Gordon, Jason Todd, and Sarah Essen), he goes into an Unstoppable Rage, taking down Harley Quinn and Catwoman (the latter of which was on his side, but simply trying to stop him from killing the Joker), and stalking the Joker through an alley. It takes Jim Gordon to snap him out of it, and, even then, Gordon had to shoot him to get his attention. Even after getting shot, Batman's still thinking of all the different ways he could kill Joker (something along the lines of "pushing his skeleton through his mouth"), but at least he wasn't choking him any more.
In Superman/Batman #1, Batman finds himself witnessing a similar situation between Superman and Lex Luthor. He notes the similarities between this and what happened in Hush, and then, instead of talking him down like Jim Gordon did (he even notes that he wouldn't do that), he notes to Superman that he could make Luthor's death look like an accident, and then he gets Superman to stop by directing his attention to something else that needs to be done that's more important.
In the film adaptation, Superman/Batman: Public Enemies, Supes goes even further when Batman, instead of Captain Atom as was the case in the comics, attempts a Heroic Sacrifice by manually piloting Toyman's rocket to destroy the asteroid. He then gives Luthor the beatdown of his life and only stops fuming when he learns there's a chance Batman is still alive.
Superman: That was my best friend... and you just killed him!
To give you an idea of how angry Superman was, at that point he was literally ignoring the effects of Luthor's Kryptonite-based weaponry.
Similarly, Nightwing flies off the handle and kills Joker (Batman revived him, mostly because his proteges have no business becoming murderers) when he believes Joker has killed Robin III and Joker has also taunted him about killing Robin II (Jason Todd).
Joker: I hit Jason a lot harder than that. His name was Jason, right?
Another example happened during the "Back In Black" story arc following Civil War. Aunt May lay dying after taking a sniper's bullet meant for Spider-Man. Donning his black costume, Spider-Man tracked down the man responsible, The Kingpin (who was serving prison time at that point), broke into the prison, confronted The Kingpin and then proceeded to give him a very savage beatdown. No jokes, No quips. He ends it by threatening to fill Kingpin's throat with enough webbing to kill him if he ever threatens Spidey's loved ones again.
Following this, the combined Marvel heroes, upon seeing Thor taken down, flip out and all attack Supes, managing to actually keep him 'off balance for a short time' -or beat the hell out of him until he's out cold.
It was so bad that he wasn't even really aware of what he was doing each time until the recoil from his gun kicked in. He was in a sort of perpetual hallucination until his family was returned to their grave.
The final arc from the Star Fox comic run in Nintendo Power had Fox McCloud going berserk upon learning that Andross was responsible both for his mother's death (a car-bomb meant for his father) and his father's disappearance in the Black Hole (because Andross sabotaged his ship). He proceeds to sport Glowing Eyes of Doom and tear the bad guys apart before going after Andross in person, but in a rare moment of not getting in the last shot like he usually does in battles, he allows Andross to escape into the Black Hole because he knows his father is going to find him and "he deserves the last shot after all these years."
A possible variation on this is Rorschach from Watchmen. He begins as a relatively capable hero, holding his own alongside Nite Owl. Following the murder of Blair Roche, Rorschach simply goes insane, and removes all traces of mercy from his actions in his blind hatred towards the "evil ones," rendering him strong enough to scare the shit out of most of New York without any weapons.
In the Disney Ducks Comic Universe Scrooge McDuck has many famous Comic book iterations of this, but none quite as amazingly awesome as in the "Yukon Scrooge" storyline. A 45 Kg Duck destroying a riverboat with his bare hands, and a concert piano.
Tycho Celchu in the X-Wing Series, at least in the comics - in the novels, Isard apparently managed to neatly excise his ability to be angry - gets mad◊ and starts swinging◊ very easily.
Gentle Giant Hulkling of the Young Avengers falls into this when his boyfriend Wiccan is erased from reality. The only reason he didn't attack/possibly kill Iron Lad is because Hulkling disappeared next.
Speaking of Wiccan, for the love of all that is good do not threaten his boyfriend. The last time this caused a temper tantrum, he made the Avengers and X-Men worry about a repeat of his mother. When Warden tried cutting up Hulkling, Wiccan would've killed the man if he could.
Colossus, normally the Gentle Giant of X-Men, is also one of the last people you ever want to get mad. Just ask Riptide. Just ask Ord from Joss Whedon's Astonishing X-Men run! Imprisoning and torturing him for two years to create a "mutant cure?" Very bad idea.
Ord: "It matters not that you escaped. Do you think that because you are made of mere metal that you can stand against me?"
Colossus: "I am not made of steel. Rage! I am made of RAGE!"
Wulf in Strontium Dog, being a Viking, becomes a literal berserker when he gets really mad. In this state, he's capable of beating up even Johnny.
Raghnarok, a French comic about a young dragon features this. When Raghnarok (the young dragon) disappears, and his mother can't find him, she gets increasingly violent as time goes by and her eyes turn red. Over time, her purple scales turn black and she goes from being perhaps 12 feet tall to dwarfing skyscrapers. She then goes on to violently wreck everything in her way while shouting her son's name. This goes on uninterrupted for ten years, and she has the entire world fearing her. All armies run at sight. Her anger is only quelled once she meets her son again- and it's notable that she is a lot smaller after stopping her rampage.
Also, Supergirl during her mini-series discovered that her lover Lex Luthor had made thousands of clones of her from the residue he collected after her fight with Doomsday. She was very close to killing him too.
In Archie Comics' Sonic the Hedgehog , the eponymous character suffers this at times despite his calm and carefree nature, particularly when his family and friends are in danger.
In the "EndGame" arc (issues #47-#50) when Knothole Village was seemingly destroyed by Robotnik's doomsday weapon (but in the end learns that it was trapped in another timezone for a short time).
Likewise in the same arc, a character named Hershey the Cat pummeled her ex-boyfriend Drago Wolf to a pulp after learning that he tricked her into killing Princess Sally (the princess herself survived, however).
Knothole was recently destroyed (for real, this time) by Eggman's air fleet, angering Sonic. It wasn't until he was taunted about the limit of his abilities when Sonic snapped and launched a devastating, but failed, Sonic Boom attack on Eggman's most powerful robot.
To paint a better picture, after the taunt mentioned above, Sonic ran off and in a few seconds was on the other side of the continent before turning around and making a beeline toward Eggman's robot. It was one of the more impressive things Sonic has done, short of being Super Sonic.
Tails, at one point, fought Sonic because he was tired of being treated as a little kid, but mainly because Sonic at one time had dated his friend's love interest, Fiona Fox. Tails was heartbroken that Fiona never loved him because of age difference, and instead loved Sonic. He was even more devastated because she was really in love with Sonic's evil twin, Scourge. He eventually went all out on Sonic while trying to rescue his dad. After Sonic learned that his friend's rage came from that fact that he took Fiona away from him, he apologized and explained his actions, and they soon made up.
Mighty is also prone to these when something bad happens to Ray the Flying Squirrel. The results are never pretty.
The Hard Goodbye from the Sin City series features Marv going on one for about a week straight, eventually taking on one of the most powerful crime families in the country. This was all because they killed one of the few people that was nice to him.
For Wonder Woman and other Amazons in their pre-Crisis incarnations, the Bracelets of Submission acted as a check against the use of unrestrained power. If Wonder Woman's bracelets were removed, she became intoxicated with power, violent and nearly unstoppable.
In Runaways, during the "Home Schooling" arc, a missile strikes the team's Malibu house, killing Old Lace and injuring Klara. Upon regaining consciousness, Klara freaks out and causes a forest of vines to grow and consume the house.
Similar to the Wonder Woman example above, Orion from the New Gods has an intense, building rage inside him that's held back by a Mother Box. The reason for this is that his father is Darkseid, and the burning hatred for all living things is In the Blood.
The Marvel Killer Robot called The Fury was a nigh unstoppable juggernaut created by an insane Reality Warper for the sole purpose of killing superbeings. It was so good at it that it eventually killed his own creator (or at least an alternate universe version of him who was just as powerful). But in the end, it was ultimately brought down by Captain UK. For much of the story, she was paralyzed by guilt and grief since the Fury killed everyone she ever knew and loved with her powerless to stop it. When she saw the Fury about to kill Captain Britain, something in her snapped, and she tore the Fury apart with her own hands, while crying, cursing, and howling with rage. In its dying moments, the Fury knew fear, pain, death and defeat.
Grimlock has had several of these in Transformers Meta and will probably have several more.
He raged against Barricade and Soundwave in the third episode when they were holding Bumblebee captive.
He beat the heck out of Barricade in the second episode when Barricade nearly took out Bumblebee.
Furthermore, he charged furiously at Slipstream when Bumblebee was, yet again, being held captive.
In the same episode, he went absolutely crazy when Bumblebee had been kidnapped and went so far as to beat up a corpse because there was no one else around that he could kill.
In the second episode, he tried to snap Wheeljack in half when the latter left Evac and Bumblebee by themselves in a potentially hostile envrionment.
Inevitably, Grimlock's Unstoppable Rages are commonly caused by, but are not limited to, something happening to Bumblebee.
In a My Little Pony / The Dresden Files crossover fic My Little Denarians, the ponies get exposed to much more non-cartoon violence than Harry would have liked - and they learn fast. At one point Derpy is shot by a sniper, causing Dash to charge across the street at the attacker. She may be a cartoon pony but she is a supersonic cartoon pony - after running across the street and up the stairs, Harry finds the room splattered with blood and bits of flesh and the furious Dash Pummeling the Corpse
Kyon Big Damn Hero. If you do anything to harm the SOS Brigade, Kyon - or if you hurt him, Haruhi - will lose it and you will suffer.
Megami No Hanabira: Yuuna flips her lid when a demon injures her girlfriend Nanami: she tears through them nigh-effortlessly with her own demons, before finally laying the last one out with a single punch.
In the Firefly fic Forward, Jayne flies into one of these when River takes a bullet for him during the assault by Niska's goons. It is described as Jayne "seeing red." Jayne periodically has these moments throughout the story, when his anger overrides good sense. Later on, River goes into one of these rages when a Hand of Blue shoots Simon, and in the resulting scene reduces his face to hamburger by repeatedly stabbing it in a hysterical, savage frenzy.
Logan Wright from Dalton has some rather serious anger issues, causing him to violently lash out at virtually everyone on a semi-regular basis.
Blaze from The Legend of Spyro: A New Dawn enters this when the curse preventing him from helping his daughter fight the Warden is broken. He shoots the Warden a Death Glare, plows straight through everything between him and his target (including the cage he was in and a mob of Gargoyles), and sends the Warden flying clear across the room twice in a row. He then leads the former slaves and his daughter in a No-Holds-Barred Beatdown on the Warden, ending it by blasting the Warden through a wall. Do not mess with Blaze's daughter!
Sleepwalker will explode into this trope when confronted with his Arch-Enemy Cobweb, who trapped him on Earth, or his Evil Counterpart Psyko, who murdered the parents of his Heroic Host Rick Sheridan. Sleepwalker's anger typically pushes him beyond his normal limits when dealing with Psyko, although even then the result is a bloodbath from which Sleepwalker typically emerges more dead than alive. An unusual twist on this trope is that Cobweb has also played on Sleepwalker's anger to manipulate him into losing focus and making bad decisions that would get him killed...at least until Rick serves as a Spanner in the Works and sets Sleepy straight.
When Violet discovers Ludlow's true motives in Episode 4, she basically snaps. And spends the remainder of the fic turning this trope Up to Eleven, which is more than enough to tip the balance of power in the protagonists' favor.
In The Wizard in the Shadows, these happen to several characters, most frequently Harry. The usual sign of Harry having been in Unstoppable Rage mode is a large crater. One caused by a previous incident of Rape Is a Special Kind of Evil was one hundred yards across. The size of a soccer pitch, in other words.
Harry when he finds out that Saruman has been torturing Sirius for the best part of seven years. He throws Wormtongue from the top of Isengard, catches, him, gives him to Éomer, drags Saruman down into the dungeons by his beard(after letting Emrys break his nose and forcing it back into joint), vaporizing the doors of Isengard, and when he finds Sirius he loses his temper completely and repeatedly uses the Cruciatus curse.
Also, Emrys doing his level best to drown Wormtongue after finding out that Wormtongue raped his sister. Theodred has to call him off, much like the Batman example above.
Harry when Ginny is poisoned by the Witch-King, unleashing the full power of a Patronus infused thunder storm. Part of the weakest bolt vaporises a Műmak.
Ginny when Harry dies unleashes three enormous tornadoes of fire on the army of Mordor, destroying the physical forms of three Nazgűl in the time it takes to snap your fingers.
Pages Of Harmony involves Fluttershy going into this at one point. She's had Kindness stripped from her so completely that she hallucinates that her pets are the ponies she believed wronged her, and tears them mercilessly to pieces. She then turns this attack on Twilight, whose Well-Intentioned Extremist actions were the cause of her present suffering, and they pummel one another into a bloody mess, with Fluttershy tearing chunks off of Twilight's skin before Twilight eventually manages to win by a margin.
In the RWBY fic Massages, Team CDRL beats up Jaune as usual, but when they reveal that they plan to rape every girl in his Unwanted Harem, he loses it and gives them a No-Holds-Barred Beatdown. The others are forced to knock him out, not out of concern for Team CRDL, because he was about to burn himself out from releasing so much energy at once.
'No fighting policy' be damned. Morals and the law didn't mean anything anymore. Jaune would kill these motherfuckers.
In Mega Man Reawakened, Robert enters one if someone he cares about or has come to respect is hurt.
Shepard's "fight" with Morinth in Avatar Of Victory begins when the latter, trying to put Shepard under mind control, targets a memory of Shepard's Love Interest Liara. Shepard flips out, enters the Avatar State, and beats Morinth into a bloody pulp before spacing her, all while declaring that this is what happens to anyone who threatens the Avatar's loved ones.
In the VERY darkMy Little Pony fanfic The Night That Never Ended this happens with Rainbow Dash when she sees one of Nightmare Moon's minions brutally murder several ponies helping her. She attacks the guard, and the scene cuts away... ...And when the scene cuts back, Rainbow Dash has not only beaten the pony to death, but has been Pummeling the Corpse for quite some time.
When the Tutanshaman Brothers threaten Draggy by saying that Draggy will be very dead after they're done dealing with Guile, this enrages Guile so much that he lets loose a furious roar which diffuses a streaming blast of fire, causes a tremor, cracks the ground and the tree trunks around him, and blows off the leaves on the trees and hedge nearby.
The Soul Eater oneshot They Shook Death City centers around Maka's quite frankly terrifying rage against people she deems bad drivers. Poor Soul spends most of the story fearing for his life in the passenger seat.
RWBY:Reckoning has Darrel being pushed to this after Ruby is shot, Blake is hurt, Sun is insulted, and he's used as a Human Shield, courtesy of Roman. Having had enough of his friends being hurt, he finally cuts loose, throwing him around like a rag doll. Of course, Roman being Roman, he fights dirty.
This happens to Rainbow Dash in Sunset of Time when Sunset Shimmer kidnaps and nearly kills Fluttershy. She leaps into the air and flies at her, ("supreme fury" on her face) screaming that she's going to kill her... ...But Sunset Shimmer just shoots her down with magic, ending her rampage before she can do anything.
In Gensokyo 20XXV, this is Reimu's response to Yume Ni kicking her in the face, the which of she felt, and she couldn't be stopped until she stabbed the latter with a pair of scissors.
Mamizou: Swinging them around madly like mad warrior and his sword, she came after her and, no matter the effort, she could not be stopped.
Pete Malloy in the Adam-12 fic "Into The Forest". One of the guys holding him and his girlfriend prisoner trys to rape her, a very bad idea. Pete breaks the strap he's tied with, despite being injured, and charges the guy with every intention of killing if need be.
Happens to Roy Desoto in the Emergency! fic "Return". He sees John Gage's uncle trying to take off John's pants to rape him, and though it is not a slash story, they are close friends, and Roy lets the uncle have it. Same thing in the author's fic "Revenge". A kidnapper Roy rescued John from comes after them and catches up to them at the station. Enraged at how they treated John, Roy gets physical with the guy.
Films — Animated
The titular character from The Iron Giant when he's threatened. Explicitly stated to be part of his programming, that has absolutely nothing to do with rage and he has no conscious control over it initially. To be clear, he resists with his little friend's help and runs away, but when the attacks persist and his friend appears to be dead, the giant emotes some very clear rage and engages his attack-response programming
In Lock, Stock & Two Smoking Barrels, Big Chris, for all his ruthless coercion and threatening demeanor, is rather a reasonable chap . . . until a man takes his son prisoner. He goes full Papa Wolf on the man, smashing his head repeatedly in a car door while roaring incoherently.
Luke Skywalker spends most of the original trilogy actively not giving into anger, because that leads to The Dark Side, but when Darth Vader makes the mistake of threatening to turn Leia to the Dark Side during their final confrontation in Return of the Jedi, he immediately goes berserk, interrupts Vader's sentence, and beats Vader on sheer, Force-augmented aggression (despite being a full foot shorter and with the corresponding reach disadvantage), only stopping after he chops off Vader's mechanical hand and realizes just how close he just came to becoming like him.
It runs in the family: when Anakin completely destroys a village of Sand People after they killed his mother. "Not just the men, but the women and the children too."
The final Luke-Vader duel would be the Ur Example of sometimes-Force-enhanced psychological warfare gone wrong. Although, sometimes spurring someone into this (particularly with repressed anger) was actually the intended effect; Palpatine had actually been attempting this on Luke right before and after the duel... but his obviousness of intent probably helped Luke pull himself back from the brink.
Obi-Wan Kenobi after Darth Maul mortally wounds Qui-Gon Jinn.
Subversion: In Mystery Men, Ben Stiller's character Mr. Furious was a superhero seemingly built around Unstoppable Rage - except that when he raged, he wasn't much less stoppable than a "normal" adrenaline-fueled angry person. He didn't become substantially stronger, tougher or faster, which wasn't very useful. During the final battle, however, his rage apparently gave him enough momentum to overcome the Big Bad. In fact, it is implied that his "rage" had really been an act until that point.
Oddly enough, in both Good Fellas and Casino, Joe Pesci seems to have a dangerously psychotic Unstoppable Rage that goes off from something as simple as a misunderstood compliment. Actually averted in Pesci's famous "You think I'm funny?" scene. He's just screwing around with Henry Hill. What he does to Billy Batts and Spider, on the other hand...
Go ahead. Fuck with Godzilla's kid. That's a dare. That's a double-dare. No matter what the timeline, fucking with Godzilla's kid is a very painful way to commit suicide, because Godzilla won't just KILL you, he'll END you.
In 300, the Captain flies into such a rage when he sees his son Astinos get his head chopped off on the battlefield during a lull in the action. A decent amount of single-handed ass-kicking ensues, until three of his fellow Spartans have to physically restrain him and drag him back to their camp. This is even more Bad Ass when his screams are carried all the way to the Persian camp, and scares them more than the deepest battledrums.
The 3rd act of the Jackie Chan film Police Story features a rare look at Jackie's typical happy go lucky character snapping and going to town on everyone that's done him wrong. This includes beating the crap out of people who can't fight worth a damn like a doctor and a lawyer, but they've all been such huge jerks through the whole film that it's easy to cheer him on every step of the way.
In The Patriot, French & Indian War veteran Benjamin Martin is fueled with unstoppable rage when his second-oldest son is shot point blank by the evil British Cavalry officer Col. Tavington. With minimal help from his two pint-sized sons, Ben brutally takes down a contingent of British Redcoats, not satisfied with making them dead but burning through all of that rage by hacking at one soldier's bloody corpse.
In Legends Of The Fall, Brad Pitt's character Tristan Ludlow goes on an Unstoppable Rage-fueled Roaring Rampage of Revenge after he watches his younger brother die on a WWI battlefield from machine gun fire and mustard gas. He not only slaughters every German in the vicinity but arrives back at field camp the next morning wearing warpaint of mud and blood and strings of fresh German scalps.
In Transformers: Revenge of The Fallen, Optimus Prime fights Megatron, Starscream and Grindor by himself and is eventually overpowered and blasted halfway across a forest area. After Megatron tries to justify his means for wanting to kill Sam, Optimus denies his reasoning, charges right into the midst of them, slices off Grindor's arm, beats down Megatron, slices off Starscream's arm (and whacks him across the face with it) then leaps onto Grindor and tears his face in two, killing him.
"You'll never stop at one! I'LL TAKE YOU ALL ON!"
In DOTM, Optimus might as well be fueled by Unstoppable Rage.
"We will kill them all"
The eponymous hero in the Spider-Man Trilogy flies into a fit of rage anytime his loved ones are threatened or harmed, usually resulting in beatdown for the villains.
In Spider-Man, Green Goblin taunts that after finishing him in their fight, he will kill Mary Jane, whilst making her death 'nice and slow'; Spider-Man quickly recovers and beats the crap out of him.
After kidnapping Mary Jane in Spider-Man 2, Dr. Octopus rather smugly refuses to give up her location and Spidey attacks him in retaliation.
This happens several times in Spider-Man 3, once where he confronts and almost kills the Sandman for killing his uncle, the next where he thrashes Harry Osborn in his own home for ruining his life with Mary Jane, the next where Harry takes a blow (two spikes attached to his board) from Venom meant for Peter and is killed because of it.
Ralphie in A Christmas Story. After getting a C+ on his "What I Want For Christmas" essay, and feeling really despondent, neighborhood bully Scot Farkus pelts him in the face with a snowball. After he adds some verbal taunting, Ralphie snaps and beats the everloving crap out of him, while other neighborhood kids look on, reducing Farkus to a sobbing, miserable wreck.
Kham in Tom Yum Goong (aka The Protector). After discovering that his elephant had been butchered and the bones set with gold and jewels, he goes into serious Heroic BSOD mode. He doesn't notice the horde of thugs beating on him until one makes the mistake of stabbing him in the side. This snaps him out of his grief and turns his BSOD into a Roaring Rampage of Revenge.
The Fugitive: Richard Kimble displays this upon finally encountering the man who murdered his wife, and upon confronting his so-called friend who set the murder plot in motion.
Film/Rage,(previously known as "Tokarev"), Nicolas Cage as Paul Maguire. "rage" is actually the point of the movie as it blinds our hero to actuality and drives him to execute a misconceived bloodbath of friend and foe
Beast against Magneto in X-Men: Days of Future Past, which is decidedly in Beast's favor, to the extent that Beast almost drowns him. Magneto only barely manages to save himself by using a nearby sculpture to restrain Beast.
Older Than Feudalism. After Patroclus' death in The Iliad, Achilles cuts a bloody path through the Trojan forces and doesn't stop for a couple more books. It's implied he was able to do this before, but now he's really mad. Actually, the whole epic is dedicated to 'menin', wrath. The opening line and invocation is:
"Sing goddess, of the wrath of Peleus' son, Achilles, that destructive wrath which brought countless woes upon the Achaeans, and sent forth to Hades many valiant souls of heroes..."
Similarly, Agamemnon! Even the Big Bad Hector was told by the King of the Gods, Zeus, to stay away!
Up go, swift Iris, and declare this word unto Hector: So long as he shall see Agamemnon, shepherd of the host, raging amid the fore-most fighters, laying waste the ranks of men, so long let him hold back, and bid the rest of the host fight with the foe in the fierce conflict.
Oh and if you think he might feel a shred of mercy for enemies begging for their lives...not if they (or their father in this case) threatened to kill his younger brother, Menelaus. His reaction is a bit...extreme.
He spake, and thrust Peisander from his chariot to the ground, smiting him with his spear upon the breast, and backward was he hurled upon the earth. But Hippolochus leapt down, and him he slew upon the ground, and shearing off his arms with the sword, and striking off his head, sent him rolling, like a round stone, amid the throng.
An Italian adaptment of the Chanson de Roland has the eponymous character gets into this state when he finds out the girl he saved and protected has eloped with an enemy soldier. The next books are all about him ravaging all around, from tearing apart any living thing he encounters to defeating an army of mercenaries throwing boulders and trees at them. To get him back to normal, his allies have to literally get his sanity back from where it fled to (the Moon).
Honor Harrington goes on several during the course of the novels, usually when someone she cares about is set upon by goons. Additionally, the entire Grayson Navy goes on one when Haven attacks Basilisk station again, as they believe that their most beloved Steadholder has been murdered by the Peeps. "Admiral Yanakov to all Grayson units," it said, and White Haven could almost hear the clangor of clashing swords in its depths. "The order is—Lady Harrington, and no mercy!"note This inspired a massive Oh, Crap on the part of Admiral White Haven, who was sure he was about to witness a massive war crime until he realised that the order was "no mercy" as opposed to "no quarter." (The former means that the victors won't be picking up survivors. The latter means that the victors won't be allowing any.)
In Mission of Honor this is what Mike Henke has Baroness Medusa and her staff do to Admiral Crandall.
Commander Vimes in the Discworld novels has occasional moments of unstoppable rage, most notable when fighting the dwarfs in Thud!, where "the Beast" that takes over at such moments is augmented by an evil psychic force. Being Samuel Vimes of the Night Watch, his sheer inner stubbornness to be a good guy and not let chaos and lawlessness win has created an inner Watchman in his psyche, to keep the Beast in check.
"You misunderstand me. I am not here to keep the darkness out. I am here to keep it in." Yeah. He fought unstoppable rage—not 'someone under rage', the rage itself as it tried to use him—and stopped it.
The rogue drow fighter/ranger Drizzt do'Urden from Salvatore's Forgotten Realms D&D novels is prone to falling into berserk rages when his self-defense reflex is triggered. Drizzt dubbed this mental state "the Hunter", as he becomes a merciless and calculating killing machine and virtually unstoppable.
In Wizards First Rule, the first book of the Sword of Truth series, when Kahlan is told Richard has died, which he hasn't, she goes into a "blood rage", killing the men who had her held down against the ground and ready to be raped without breaking a sweat.
She doesn't just kill them...
The badgers in the Redwall series are prone to a "bloodwrath," in which they become unstoppable berserkers who are blind to all but their target.
Occasionally, other creatures will go into a similar state as well, particularly Redwall Warriors if their loved ones are threatened.
The entire Hradani race of the Bahzell series. The race was originally more Elf like, being taller and having fox like characteristics along with a longer life than humans (at a cost at not being able to use magic as direct as humans). Then Wizards start experimenting with the Rage a few had. During the last war they were converted into an evil force of berserkers. Until the few with natural unstoppable rage were able to rebel. It's to the point that if you give yourself to the rage you're immune to nearly all magic. The main character nearly kills the only good wizard left on the planet when he hears the word "wizard," triggering his rage.
Hradani didn't start with the Rage - it was forced into their species by dark wizards serving the evil pantheon of that world. Even twelve hundred years later, you wouldn't want to face one of them - Hradani come in two sizes: large and ginormous. Bahzel falls in the ginormous category himself - he's nearly eight feet tall, weighs nearly four hundred fifty pounds, and he moves like a cat. And that's when he isn't using the Rage.
Deepgate Codex: Carnival is dangerous enough at the best of times, but when she gets sick of something she goes into god mode, at which point not even the laws of physics can stop her single-handedly slaughtering half an army using a regular everyday handheld gardening fork.
Harry Dresden tends to cause a lot of property damage when he's pissed off, and has, at various points: killed an enormously more powerful wizard, Justin DuMorne; redirected a lightning bolt at a demon that was chasing him; thrown a werewolf all the way through two buildings; burned down a building containing hundreds of vampires because they grabbed his girlfriend; brought out all the ghosts under the building at once, collapsing it; killed several incredibly powerful demon-possessed psychos; shredded a mob of vampires with an antipersonnel mine; blasted a huge torrent of fire straight into the middle of the Winter Court of the Sidhe... Well, you get the idea.
And all that pales in comparison to "Blackstaff" McCoy, who in a fit of rage over a threat to someone he cares about yanks a old Soviet satellite out of orbit and drops it on a vampire nobleman's estate just to make a point. Or later, when defending his family and friends simply rips the life out of dozens of people. No fire, no explosions, he just points at them and they die.
A particularly extreme example of this is Icarium from Steven Erickson's Malazan Book of the Fallen. Icarium, normally a gentle and creative fellow verging on pacifism, has a tendency to go into a berserker mode that's downright genocidal when provoked, usually followed by an inability to remember what just happened. In milder cases, this means he wakes up confused among the gutted bodies of whatever ferocious pack of creatures just attacked him. In a few more extreme cases, he woke up among the shattered ruins and dead citizens of entire civilizations, completely unaware of what had just transpired.
In The Pendragon Adventure, Saint Dane has a habit of confronting Bobby in order to smack him around for the hell of it. For the most part, though, he's just egging Bobby on as part of his Mind Screw technique. This changes in Rivers of Zadaa when Bobby - in the midst of being smacked around - stands up to Saint Dane and claims that the villain is getting desperate because he is losing the overall war. Saint Dane utterly snaps and proceeds to beat the living shit out of Bobby, to the point where Bobby spends a month in a hospital before he can walk again.
Each of the villains in the series represents a deadly sin, with Sir Thursday representing wrath. He beats his subordinates for minor failures and deeply enjoys battle. At one point he kills children who have been enchanted into motionlessness just because they are not obeying his orders. They're not "following orders" BECAUSE THEY CAN'T MOVE. Thursday doesn't care.
The part of the Will he guards, which symbolizes Justice, has anger issues as well, spitting in the face of someone during a parley.
Darkest Powers: Although Derek keeps his cool when he's the one in danger of being seriously hurt, possibly tortured, or killed, the same does not hold true when other people are at risk. Being a werewolf, Derek's rational mind will shut down and give way to pure "protect my pack" instinct when the tiny number of people he actually cares about are in danger. At least one person is already spending the rest of his life regretting having threatened Derek's brother.
Mrs. Weasley shows a bit of this in Harry Potter and the Deathly Hallows with her famous line "NOT MY DAUGHTER YOU BITCH!" followed by the death of a certain loyal female Death Eater. That proves never to mess with one of Mrs. Weasley's children. (This includes Harry, who earlier in the series she outright declared was her own son in all but blood.)
Hagrid may be a Gentle Giant, but if you do manage to get him into a real temper you'll find out that he's partially immune to spell damage and has more than enough strength to take down five armed attackers with his bare hands.
Harry himself shows traits of this. Despite being a fairly decent person, he too has moments where he looses control of his temper. One good example would be after Bellatrix murders Sirius, where Harry briefly uses the Cruciatus curse to bring her down.
But the horror that paralyzed and destroyed Ascalante roused in the Cimmerian a frenzied fury akin to madness.
Touchstone in the Old Kingdom series. In the first book, Sabriel is shot with an arrow and he runs very, very fast. Later a Noodle Incident is mentioned in which a fake ambassador (a 2 metres tall barbarian) tries to kill Sabriel with a toasting fork; Touchstone grabs him and throws him down the table while roaring with rage. He then tries to throw the throne after him.
In the Lonely Werewolf Girl books, Kalix's unstoppable rage when she goes wolf has been the downfall of more than one werewolf hunter.
This trope is an inherited characteristic of the Viking-descended Barnikel lineage in Edward Rutherfurd's multi-generation historical novels. Do not anger a member of this family, whether it's by threatening to expose their role in La Résistance or abusing a puppy in front of a fifteen-year-old Barnikel boy.
Visser Three in Animorphs had one of these several times a book practically.
In one novel, Unity, protagonist Andorian Shar enters a state of Unstoppable Rage when battling a Kurlan-possessed woman aboard Deep Space Nine.
In an earlier book, Twilight, he enters one while incapacitated by injury and so takes it out on the ground by slamming his fist against it repeatedly (causing himself further injury).
In The Lord of the Rings Éomer holds himself together rather well when his uncle, King Théoden, is slain in the Battle of the Pelennor Fields, but when he unexpectedly learns that his sister Éowyn died (or so he believes) too, he quite loses it. His troops take heed:
"Then without taking counsel or waiting for the approach of the men of the City, he spurred headlong back to the front of the great host, and blew a horn, and cried aloud for the onset. Over the field rang his clear voice calling: 'Death! Ride, ride to ruin and the world's ending!' And with that the host began to move. But the Rohirrim sang no more. Death they cried with one voice loud and terrible, and gathering speed like a great tide their battle swept about their fallen king and passed, roaring away southwards."
Also the Ents, considering how docile they are and how long they generally take to deliberate upon matters. Saruman's treachery invokes such a fury in them that Isengard and all its orcs could do nothing to stop the raging ents.
In The Silmarillion, we have several characters succumbing to Unstoppable Rage, most notably Fëanor and Túrin.
Swedish writer Simona Ahrnstedt gives us many horrible scenes in her debut novel Överenskommelser, but the following is among the worst: You would think that after he had raped his (much younger) bride at their wedding night, the heinous villain Rosenschiöld would at least not be able to stoop any lower. But he obviously still had the nerve to go into a rage when he found out that his bride wasn't a virgin. Let's just say that poor Beatrice was lucky to survive that wedding night. And yeah, Rosenschiöld also kept taking out his anger on innocent prostitutes until he suddenly got ill and died at the brothel a couple of days afterwards.
David Banner: "Don't make me angry. You wouldn't like me when I'm angry."
Step by Step: Frank, when he got angry — particularly protecting stepdaughter Dana or biological daughter, Al. Frank (along with Cody) once beat up a dozen ruffians in a bar on the bad side of town by themselves. Later, when he confronted a corrupt TV advertiser about using Al in a 1-900 sex hotline (when the commercial was supposed to be for suntan lotion), he tore apart the office and nearly threw the young man to his death from a high-story window unless he confessed and turned over the master tape to him.
In Heroes, Niki Sanders's alter ego "Jessica", who has super-strength, mostly appears whenever somebody else threatens her son or otherwise angers her.
In The A-Team episode "Without Reservations", Face is shot during a hostage situation in a restaurant. Murdock spends most of the episode in a state of Tranquil Fury, until right near the end, when he finally gets his hands on the guy who shot Face, starts pounding him relentlessly, and actually has to be restrained before he finally stops. It's really not a good idea to hurt someone Murdock cares about.
In the Doctor Who episode "The Runaway Bride", after seeing the Doctor bring down the wrath of a Time Lord on his enemies, Donna points out just how creepy Unstoppable Rage is, especially coming from the hero, and questions whether we should be rooting for it.
Donna: That place was flooding and burning and they were dying and you stood there like...I don't know, a stranger.
As seen in "Turn Left," he would've died there had Donna not been there to stop him from going too far.
Do NOT threaten his companions. Seriously.
Case in point: After a companion is kidnapped in series 6, the 11th Doctor blows up an entire legion of Cyberships just for some information (and to prove a point) and forms an army to storm the guilty party's base. This quickly backfires in a spectacular fashion, but still.
The Daleks seem to induce this in the Doctor quite a lot. When the Ninth Doctor runs across a stray Dalek captured in a museum, he has a meltdown in which he rants and raves at it about the Time War and sadistically gloats about massacring its species before torturing it with electricity until he's physically dragged away kicking and screaming. When the Eleventh Doctor again encounters Daleks masquerading as Allied weapons during WWII (dashing his belief that he had once again slaughtered them all in the previous season finale), he works himself into such a fury while trying to get the Daleks to reveal their identity he winds up uncontrollably whaling on them with a metal pipe while hysterically screaming semi-coherent threats and insults at them. Both times, he really freaks out his companions and various bystanders by suddenly plunging into a seemingly uncharacteristic near-psychotic rage at the sight of these squat, hammy, plunger-armed pepper-pots, despite displaying reason and pacifism with his enemies on other occasions.
Jack Harkness of Torchwood, while a generally calm man, does go into a rage whenever his team is threatened and, due to his immortality, he's hard to stop.
Although he's usually the epitome of The Stoic, really piss Teal'c off, like with what happened in the episode "Talion," and he will stop at nothing until you are dead. It's a Jaffa revenge thing, y'see.
This almost happens in an earlier episode when he finds out that his wife remarried.
Data gets a brief one of these in the first part of the Star Trek: The Next Generation episode "Descent", resulting in him killing a couple of Borg with his bare hands. This was also, technically, his first ever experience of emotional rage.
When Glory drives Willow's girlfriend insane, Willow attacks her with black magic, actually managing to hurt her despite Glory being a hellgod. This foreshadows her Dark Willow phase - when Warren shoots Buffy and kills Tara, Willow flays him alive, goes after his partners, fights her own friends when they try to stop her, and nearly destroys the world.
Giles goes after Angelus after the latter murdered Jenny Calendar. With a flaming baseball bat.
Seen several times with Buffy herself; during her first fight with Angelus, he initially has the upper hand before he goes overboard with his taunts, after which she beats him up and backs him into a corner, but stops just short of killing him, instead settling for kicking him in the groin and walking away.
On the Angel end, we have Angel's near-killing of Wesley after the kidnapping of Connor. Gunn, Fred, and several orderlies could barely haul him off of Wes.
Angel: YOU THINK I'D FORGIVE YOU? NEVER! YOU TOOK MY SON! I'LL KILL YOU! YOU'RE A DEAD MAN, PRYCE! YOU'RE DEAD! YOU HEAR ME?! DEAD!! DEAD!!
Never ever make Admiral William Adama angry, because not only will you get the most terrifying Death Glares on TV but he'll make sure you are dead within three episodes. For instance, when he suffers a mutiny, he flies into a Foe-Tossing Charge to the CIC, and the mutiny leader surrenders before he gets there. He has on two occasions bludgeoned a Cylon to death—a humanoid and a centurion.
Beware the Nice Ones: In the finale, in order to resolve the conflict between humanity and the Cylons, the Final Five have to share memories to give the Cylons what they want. Problem is, one of them killed another's wife. Tory tries to emphasize that they need to just live and let live before they start the process, but when Tyrol learns that she killed Callie, he pulls out and strangles her to death then and there, a look of pure anger, rage, and hate on his face.
In season one The Mole Nina Myers tells Jack Bauer that the Drazens have murdered his daughter Kim. This proves to be the single biggest mistake that the bad guys ever made that season, as Jack then proceeds to storm their compound in a truck and go to town on everyone with both guns blazing.
In any given Garo Episode, the basic rule is that if you mess with Kaoru, call her a bitch, threaten her, or take one of her paintings and scratch a coin against it, KougaSaejima will hunt you like an animal, and he will go on a Roaring Rampage of Revenge until what was wronged is made right. He's done it in the finales of both the original series and Makai Senki, brutally killing both Big Bads, one of whom was a friend of his from his training days as a child. The other was the former student/killer of his father
In the iCarly episode "iMake Sam Girlier", Sam snaps out of her attempts to become more feminine and launches right into a bout of screaming rage after the new bully in town pushes her best friend Carly to the floor.
Also when Freddie handcuffed Gibby to her.
"OPEN THE DOOR, BENSON!!!!!"
Crops up in Professional Wrestling at times; it's typically called 'Hulking Up'. The bigger you are, the more you can get away with here.
Hulk Hogan built a whole career on this trope, getting beaten badly in the early minutes of his fights only to become unstoppable and nearly invulnerable to his opponent's attacks once he hulked out.
This was also a key part of Tazz's gimmick in ECW, to the point where Joey Styles would often ask, "Who can stop the path of rage?"
Parodied in The Avengers. Normally unflappable spy Steed gets thrown around by a bigger, better fighter. His eventual victory takes place off screen, with Steed's boss Mother narrating the villain's fatal error: He made Steed angry.
Mork and Mindy: Mork from Ork, at least twice. Once when Klansmen deface Mindy's home when they find out she's Polish (he returns the favor to their lodge), and again when a robber hits and bullies Mearth in a bar. Also counts as Crouching Moron, Hidden Badass.
Similar to the example in Sword of Truth, Legend of the Seeker takes it one step further by having Kahlan's eyes go blood-red, scream loudly, and gain the ability to confess multiple people remotely (which, apparently, also allows her to confess a Mord'Sith without killing her). The first time it happens when Darken Rahl taunts her by saying that he will use her powers to confess Richard. She actually expels the needles stuck in her with such force that they stick into Rahl's wizard's neck, leaving Zedd the last wizard of the First Order. The second time happens when she finds out that Cara killed her sister, forcing Richard to hold her down, as Cara escapes. The last time (due to cancellation) happens in the finale, when a Sister of the Dark manages to confess Kahlan. When the heroes, with assistance from Mord'Sith, try to kill the Sister, Kahlan again flies into the Con'Dar state, confesses the Mord'Sith and has them kill each other. She then tries to confess Richard but fails, so she stabs him instead.
The title character from Kamen Rider Kuuga is normally a pretty nice guy that wants nothing more than to protect people's smiles. That said, do not piss him off. When a sadistic Gurongi Tribesman by the name of Go-Jaraji-Da (also known more simply as the Porcupine Gurongi) pushed him too far in episode 35, the result was a brutalNo-Holds-Barred Beatdown that ended with Godai finishing him off with a rage-fueled Rising Calamity Titan attack.
This is at the core of Kamen Rider Agito's Burning Form. The angrier Agito gets, the more powerful it becomes. However, somewhat subverted as it's not as strong as its evolution, Shineing Form, which doesn't require rage.
In the Criminal Minds episode "100", Aaron Hotchner gets into a fight with George Foyet, a spree killer who is obsessed with him after he has kidnapped and murdered his wife. Foyet has gained the upper hand in the fight and tells him that, once he kills him, he's going after his young son who is hiding somewhere in the house. Upon hearing this, Hotchner suddenly regains his strength and beats him to death in a fit of rage; when his colleagues arrive, they manage to restrain him, assuring him that he's already dead.
CSI: Crime Scene Investigation: Catherine Willows was a good example of this in "Lady Heather's Box". Eddie's girlfriend started griping about wanting to save Eddie more than Lindsey, and it was all the team could do to hold Cath back. The girlfriend had taken an injured Eddie and left Lindsey alone, in the car, in an insanely heavy rain, after they'd run off the road into a canal. Because of this, Lindsey nearly drowned.
(After being asked to clarify she left Lindsey alone under those conditions.)
Girlfriend: "So!? It's not my kid!" (cue mama bear Catherine)
Horatio Caine on CSI: Miami and Mac Taylor on CSI NY get the same way if you harm their significant others. Horatio tracked Marisol's killers all the way to South America when she was killed,and when Christine was kidnapped, it was clear that nothing was going to stop Mac from getting her back alive.
Sheppard: "Ronon has some things he wants to take care of first."
McKay: "Are you insane? There's at least twenty-five Wraith down there!"
Teyla: "Also, Ronon appears to be quite angry."
(five minutes later, all the Wraith are dead, mostly at Ronon's hands)
Tommy Oliver flies into this once in Power Rangers Dino Thunder. Zeltrax taunts him with his students' impending deaths at the hands of the episode's extra-strong giant monster. Tommy responds by beating Zeltrax within an inch of his life and then killing the monster with the Brachio Staff's newly-activated powers. Without growing or anything.
Babylon 5: Some idiot makes the mistake of throwing a knife at John Sheridan, who is saved because Delenn throws herself in front of it instead. Sheridan's response is to attempt to kill the being responsible with his bare hands, and he would have succeeded if Security hadn't intervened.
In Farscape, Luxan males are prone to a condition called hyper-rage, a berserker state in which they'll attack anything else male around them without thought for no reason whatsoever, though older Luxans do develop the control to prevent themselves from entering it in the first place. A later episode suggests that Luxan males in this state will assault anyone, even their own spouses, which is why Luxans are never permitted to marry young and must wait until they've learned to control it. This is a particular issue for D'Argo, since his Sebacean wife was nowhere near as durable as a Luxan woman would be, which her Peacekeeper brother was able to use to frame D'Argo for murdering her in a fit of hyper rage after he accidentally killed her himself.
In Breaking Bad, after Jesse connects some dots and comes to the realization that Walter was the one who poisoned Brock, he breaks out of the Heroic BSOD that he had been in for three episodes and storms into Saul Goodman's office, beating a confession out of him at gunpoint, threatening everyone who enters, and finally driving furiously to Walter's house and pouring gasoline over everything.
Vincent in the '80s Beauty and the Beast series is much the same. Do not hurt Catherine; he will go through any obstacle in his way to help her. And he has a mental bond with her.
An episode of Agents of S.H.I.E.L.D. revolves around a piece of Applied Phlebotinum that causes this. The villains-of-the-week, along with two of the heroes, are affected by the weapon and subsequently are filled with intense strength and anger.
In the Adam-12 episode "X Force", the officers search for a missing child and find her in the home of a molester, already injured. The guy says she asked for it, and Malloy loses control, slamming him into the wall and choking him. Naturally, the sergeant and captain aren't amused and he's suspended.
In Akuno P's Evillious Chronicles, the sin of Wrath is represented in The Muzzle of Nemesis, sung by Gumi. The singer, an assassin appropriately named Nemesis, is seeking revenge on her former employer, who ordered her to kill her lover. In a twist, the employer is not only her father, but the corrupt judge who represented Greed. Notably, she does give him a chance to repent.
Myth And Legend
Older Than Dirt: Sekhmet, an Egyptian goddess of war, pestilence, and healing, went on a bender when some mortals dared suggest that her father, the sun god Ra, was getting a little old. She had no intention of stopping and nearly exterminated humanity. Finally Ra himself stopped her, and then only by making a literal sea of beer mixed with pomegranate juice. Sekhmet, mistaking it for blood, drank herself stupid, and thus the world was saved by alcohol.
Cuchulainn from Irish mythology has a prime example of the "monster within" kind of unstoppable rage. In the epic, Táin Bó Cúailnge, he enters a "ríastrad" or "Warp Spasm". In this state he transforms into a horribly mutilated monster who doesn't know friend from foe. At one time, they broke him out of his rage by dunking him into three separate water barrels. The first one exploded, the other began boiling, and the last one finally cooled him down.
This would later be co-opted into 2000 AD's Slaine, where they got really creative.
In Classical Mythology, Hercules killed his wife and children in a rage induced by Hera. Less supernaturally, as a kid Hercules killed his music teacher with a lyre.
The normally gentle Hindu goddesss Uma can transform into death dealing, world ending Kali. She does this to kill the demon Raktabija, after all the gods cut into the demon, only to find that his blood creates clone of himself once it hits the ground. Kali fixes the situation by inhaling all the blood before it touches the ground as she goes on her killing frenzy. Some legends continue that she would have turned her violence on the gods if Shiva, her husband, didn’t lie amongst the dead in a desperate gambit to get her to stop. This is particularly sobering as Shiva has the ability to unmake all of creation and was pretty sure the only thing that could stop his wife from killing everyone was to gamble on his importance to her.
Norse Mythology is the very source of the word 'berserker' (from an Old Norse word meaning "bear shirt"), and was full of them, most famously Thor.
According to Japanese Mythology, the storm god Susano-o flew into a drunken rage and did everything possible to mess up his sister Amaterasu's life. He defiled all her shrines, killed her handmaidens, and threw shit in her temples. The gods were unable to stop his overwhelming douchedness.
Featured in The Avengers (Stern), where the Incredible Hulk sits on the playfield. During the game, he flails his fists and grabs pinballs; premium editions even include a "Ramp Throwing" action where the Hulk throws a ramp.
Normally in a game of Warhammer 40,000, casualties cause squads to have to pass a Morale test or fall back. Space Marines of the Black Templars chapter, however, are so fanatical that the sight of dead comrades makes them charge forward to avenge the fallen. This occasionally leads to a squad's Sole Survivor assaulting a daemonic manifestation of blood and rage.
The Blood Angels chapter has a different problem, brought about by the Genetic Memory of their Primarch's death during the Horus Heresy. Battle-brothers are sometimes afflicted by the Red Thirst, driving even heavy weapon troopers to abandon their positions and try to tear apart the foe in close combat. A worse case is called the Black Rage, whereupon the eve of battle, a Blood Angel completely forgets his own identity as he hallucinates his Primarch's final moments. Such unfortunates are placed in the Death Company to form berserker assault squads, and any survivors are granted the Emperor's Peace after the battle.
Khorne Berzerkers, obviously, are so full of bloodlust that they Feel No Pain and barely remember to fire their pistols in their haste to maim and kill with their Chain-Axes. Kharn the Betrayer is legendary for being so consumed by rage that he never misses in close combat - he either hits the enemy, or someone on his own side. In fact, he'll happily take the skulls of his supposed allies for want of another foe to kill.
Amusingly, there was a Chaos battleship named the Unstoppable Rage, but it was destroyed by an Eldar vessel and so didn't really live up to its moniker.
One of the special abilities of the Tau Ethereal leader Aun'Va is that he is so beloved by his troops that if he dies, he triggers an Unstoppable Rage in all Tau troops in line of sight, giving close combat bonuses to an army that normally prefers to blast apart foes with Beam Spam.
The World of Darkness gamelines feature this trope, mainly with the vampire and werewolf games in both systems.
When a vampire character in Vampire: The Requiem or Vampire: The Masquerade enters a Frenzy and lets the Beast within take control, he or she can tear lesser foes to shreds and overwhelm another vampire, as they are able to ignore all wound penalties. A more powerful (and usually elder) vampire can still take a frenzied vampire down, especially if he goes into frenzy himself. Vampires interested in maintaining the Masquerade frown on those who frenzy, while those who aren't tend to embrace it.
Werewolves from Werewolf: The Forsaken and Werewolf: The Apocalypse have the Frenzy ability as well, and alternately embrace it and fight it (noted that vampires, in game terms, roll to resist going berserk; werewolves roll to both resist and trigger it). They tend to have an even easier time than vampires, since frenzy is always accompanied by turning into a 9 foot-tall lupine death machine... that paradoxically makes their Masqueradeeasier to maintain due to something called the Delerium. Still, Forsaken calls it "Death Rage" for a good reason.
In Werewolf: The Apocalypse, going too deep into Frenzy causes the werewolf to enter "Thrall of the Wyrm" in which they go absolutely bonkers. This results in either shredding everything in sight, eating everybody in sight, or violent necrophilia, and always a ton of shame when the perpetrator regains their wits. There are also a few Gifts, such as the wereleopard Gift Shiva's Might, that lets the character deliberately enter a (normal) Frenzy.
Both gamelines' vampires and werewolves, can instead enter Unstoppable Terror — known as "Rötschreck" for vampires (either line), or "fox frenzy" for oWoD werewolves — with the victim fleeing in blind panic from the trigger, tossing aside or shredding anything that stands in the way of doing so. In New World of Darkness and Werewolf: The Apocalypse it's treated as another facet of the Unstoppable Rage, while Vampire: The Masquerade treats it as an unrelated phenomenon also originating with the vampire's Beast. In Werewolf: the Apocalypse, shapeshifters experiencing this will normally take their full animal form for speed — Forsaken's werewolves become the 9-foot tall lupine death machine for either type. Werewolf: The Apocalypse has human witnesses freak out any time they see a werewolf or other shapeshifter in their hybrid form.
Prometheans also have their own state of emotional disarray, known as Torment. How rage-filled Torment really is depends on the element of the Promethean's humor, but each one has some elements of Unstoppable Rage. Frankensteins (fire) and Tammuz (earth) have the more traditional "Hulk Smash!" rages, Galateids (air) tend to go all Fatal Attraction when it comes to obsessing with others, Osrians (water) go cold and emotionless, and Ulgans (spirit) lock onto whatever spirit is closest and copy its traits. And then you've got the rare nuclear Prometheans, the Zeka, whose Torment tends towards "destroy everything."
And, for added fun, instead of prompting normal Disquiet in vampires and werewolves, Prometheans instead cause an unsettling feeling in them that makes it increasingly more difficult for the other supernatural to resist Frenzy or Death Rage the longer they stay together.
In Dungeons & Dragons, a base class, the Barbarian, is built around this idea. Rage is the Barbarian's primary special ability, allowing them a marked increase in their physical prowess and mental fortitude in exchange for a slight decrease in their willingness to dodge blows and think straight. The ability becomes more potent as the character's level rises. Unlike most fictional versions of this trope, Barbarians may invoke and end their Rage at will (but are limited to one rage per encounter), not in response to any specific trigger.
Third Edition also has an "on steroids" — or perhaps, "on 'roid rage" — prestige class version of the barbarian: the Frenzied Berserker. The main difference is that there are few defensive benefits to a frenzy (but see below) as opposed to a rage, that its bonuses and penalties can stack with a rage, that frenzy will continue until its time limit expires or the character forces himself out (rage can be ended at will, but you need to make a Will save to end a frenzy) — and if he runs out of enemies the character will attack anyone in the vicinity, including allies — and finally that it can be triggered by damage as well as entered at will. Finally, he can also inspire frenzy in his allies, which if you consider that most frenzied berserkers probably hang around a lot of barbarians and fighters as opposed to wizards and rogues is a very scary thought.
This is a very good example of the trope, as a properly built Frenzied Berserker is one of the most powerful physical combatants possible under 3rd and 3.5 edition rules—without even going into epic level, a half-orc Frenzied Berseker could have a Strength of 36 while in a raging frenzy. This is enough to match or out-muscle most high-level fiends and celestials, all but the oldest and mightiest dragons, and many lesser deities in terms of raw strength.
The berserker's frenzy has a tropetastic defensive benefit. While Frenzying, HP damage will not kill him until the Frenzy is over. There's also a feat which lets him delay the effect of any attack until the end of the Frenzy. This can lead to some very interesting moments if he's hit with the big bad's Wave Motion Gun during his Frenzy. Also a notable counter for many damage-output Min-Maxing builds. See Glass Cannon. Sadly, this can be stopped suddenly by a 2nd-level spell called "Calm Emotions".
Dragons have a boosted one of these in a prestige class called the Bloodscaled Fury. It's compared to a barbarian's rage as a barbarian's rage is to a child's temper tantrum.
There's also the Tainted Raver template, which is a person driven mad by the taint mechanic. Basically, they're permanently raging, but with the ability to do anything their class could normally do, like spellcasting.
And now there's Fourth Edition, which introduces the Barbarian again. The 4E Barbarian is a bit more primal than his 3E counterpart, and his Daily powers, known as Rages, give effects that last for the entire encounter or until he enters a new Rage, give his At Will powers more power, and allow him to dish out Rage Strikes that expend unused Dailies to deal more damage against an enemy.
Pathfinder allows barbarians the option of performing any number of superhuman feats, or shaking off any number of incapacitating effects, while raging.
Limit Break in this game is part Heroic BSOD and part Unstoppable Rage. After having their virtues pushed to the breaking point, many Exalted will either A) act towards them with little thought of restraint, or B) act against them with little thought of restraint. This can get messy fast when the Exalt in question values Compassion or Valor. The two Solar Limit Breaks that best exemplify this are Berserk Anger and Red Rage of Compassion. RROC is slightly less psychotic but still tends to cause collateral damage on par with a very cranky airstrike.
The Lunars can become the very embodiment of this trope using the aptly-named Endurance Charms. One charm lets you shrug all damage as long as you channel Essence to it, another lets you not drop dead even if you, by all rights, should be. The fluffs say that Lunars using those charms raged for days as the world arrayed to kill them and their Solar mates.
Solars also have a Resistance Charm that allows them to do this. Prematurely ending it takes a significant mental toll (it costs a ton of Willpower points and accumulates a lot of Limit) unless they are restrained by a friend or loved one.
And then there is an expansion to Infernal Monster style by Ink Monkeys, which puts its possessor into a permanent state of Unstoppable Rage. The name? Untamed Apocalypse Shintai.
Righteous Fury mode is the Buffy and Angel RPG version of Unstoppable Rage. A character can spend two Drama Points to go into Righteous Fury mode, but only in response to something very bad and deeply personal happening, like a brutal attack on a loved one, an unexpected and very nasty betrayal, or the raising of a monstrous former lover killed years ago. When in this mode, the character gets a + 5 to all attack actions for the rest of the fight, which is cumulative with Drama Points spent for Heroic Feats. Even a White Hat can kick serious ass when properly motivated like this.
Thirteenth Age has the Barbarian, whose berserk rage allows them to roll twice for every attack and pick the best, but there's also the Sorcerer - those who take the Infernal Heritage Talent can enter a spell-frenzy that lets them roll twice for every attack, but each die that comes up a miss will kick you in the head just a bit.
In Romeo and Juliet, Romeo goes into unstoppable rage after Tybalt kills Mercutio ("...Mercutio's soul/is but a little ways above our heads.../either you or I or both must go with him.") Also seen again when he kills Paris ("Tempt not a desperate man"). Romeo's always in some exaggerated emotional state or another. (What do you expect? He's fifteen.)
Hamlet is theoretically in unstoppable rage after the last soliloquy of the play ("...from this point forth/my thoughts be bloody or nothing worth"), but, given that this is Hamlet, two scenes later he's cracking jokes with a gravedigger.
The Winter's Tale is about what happens when an extremely powerful man gives in to paranoia and unstoppable rage and takes it out on his subjects.
Assassin's Creed: Revelations Ezio goes berserk when he finds Yusuf's body and launches a full scale assault on Istanbul's arsenal. Only one person is spared.
Splinter Cell: Sam Fisher hits this at the end of mission eight of Conviction, where he learns that Lambert was behind faking his daughter's death in Double Agent, at which point, at least for the rest of the mission, Mark and Executes are free, as in no need to CQC enemies to earn them, there's no need to designate a target (simply moving over them with the cross hair makes them a target), and the meter is up to a max of six at this point.
"Unstoppable Rage" sums up Kratos from the God of War series. Plus, he has an ability named "Rage of the Gods/Titans/Sparta", that makes him more unstoppable.
In Ghost of Sparta, Kratos may have topped himself after seeing Thanatos kill his brother. The man truly becomes rage incarnate at that moment.
Fairly late in Super Robot Wars: Original Generation, the hero's girlfriend is kidnapped by a traitor, and brainwashed into not only attacking him, but also aiming deliberate, emotional attacks at him. The result: His mech becomes nigh-unstoppable for the duration of the battle as he performs a Foe-Tossing Charge towards the traitor.
Downplayed in that Kyosuke never actually shows any real emotion.
The Kaiser Dragon from Breath of Fire III and IV. If Ryu transforms into this from without some tweaking (in III it was a specific combo of Dragon Genes, in IV it required you to gather the various breath weapons of dragons), he'll kill his allies.
The scene where he unlocks it in IV is particularly noteworthy. After he easily exterminates the army officer who pissed him off to such a degree (by slaughtering a village of innocent civilians and THEN setting an absurdly powerful monster on your team, which Ryu also destroyed), he's STILL angry and ready to kill, quickly turning his sights on another officer (who can only point her gun at him while shaking in terror), getting his only lines in the game by screaming in rage the entire time. The whole scene is decidedly scary, and it takes a Cooldown Hug from Nina to bring him back to normal. As the Cooldown Hug occurs, Fou-lu is driven to rage when his girlfriend is used to fuel a nuke.
This trope is a recurring theme in all five Breath of Fire games. The above covers III and IV.
In Breath of Fire I, the only way to get the "True" ending is for Ryu to unleash his most unstoppable form, an Eleventh Hour Superpower useable only in the final battle, which combines all of his allies into a giant gryphon-like-dragon monstrosity hell-bent for destroying an evil goddess from making all of their lives, along with the entire war-torn world, a living hell. The goddess was also indirectly responsible for Ryu's sister's death, so that may have added some fuel to the fire.
In Breath of Fire II, Ryu's second most powerful dragon form is unlocked during a boss fight where a trusted member of his own tribe is revealed to be working for the villains. After taunting and provoking him, the boss finally pushes Ryu to the next level by enraging him, which he reveals was his goal from the beginning.
Upon reaching the final boss, Ryu and his party are encased in crystal by the final boss. The boss then moves party member to party member, revealing the true intentions for each one following him. He then shatters each party members' crystal, killing them, and then simply floats away, leaving Ryu alone, frozen in crystal. Ryu explodes out of his prison, and in the best cutscene an SNES can muster, charges at top speed after the boss, dodging fireballs and explosions until reaching the boss. He then leaps high into the air, and delivers a mortal wound to the boss (until the boss reveals his true form). In the following fight, Ryu unleashes yet another Eleventh Hour Superpower only useable during the final boss fight.
In Breath of Fire: Dragon Quarter, Ryu is hybridized into a Human/Dragon mix, but it is assumed that a hybrid is far weaker than a full-on dragon (as seen by Odjn, who is little more than a dragon that has been pinned to a wall, possibly for centuries, half his body decayed, but remains alive out of force of will). So when the final boss is a fully resurrected dragon taking aim at his only two friends in the world, Ryu bursts across the other side of the room, getting the dragon's attention. As the boss rears back to fire it's massive breath weapon, Ryu leaps from the balcony he's standing on and fires his own projectile. The two streams of energy collide, and a beam struggle commences. Ryu has a D-Counter, which ranges from 0%-100%. Should it hit 100% at any point in the game, Ryu "dies", no continues, do not collect 200 dollars, etc. During this fight, Ryu is so fueled by his rage and need to protect his friends that he pushes himself far beyond his normal limits. He actually breaks the D-Counter, in-game mechanics, forcing himself to go to roughly 164% before finally being able to overpower the enemy dragon, saving his friends.
Everybody in the online gang League of Angels (literally, everybody) uses Rage as a weapon; your character, members of your party, the Angels, Boss enemies, and even mooks. A character's Rage Meter fills as he and/or his allies take damage, and when full, it is used to unleash a powerful attack or other ability. (The power and type depending on who it is and how powerful the character is.)
Arcueid of Tsukihime most notably loses her cool during another heroine's route, when you turn downher offer to turn you into a vampire and slice her nearly in half. The humiliating, excruciatingly painful, and oh-so-temporarily debilitating injury drives her insane, removing the self-imposed restraints on the majority of her power...
In Arcueid's own route, when she gets cut in half by Roa and dies in Shiki's arms, Shiki goes berserk. Roa is several kinds of Deader than Dead by the time Shiki comes down from it.
Actually, nearly all of the routes have a tendency to end with Shiki falling into this mode. In Akiha's route, after SHIKI hurts Akiha, Shiki completely loses it and goes into his killer mode. Later, in the same route, when SHIKI Mind Rapes Akiha, it takes all of Shiki's willpower to not kill SHIKI immediately. He does kill him, but not before SHIKI tells him how to bring Akiha back to normal. Then, in Hisui's route he goes into a similar homicidal rage when SHIKI either badly wounds or, if it's your first playthrough, kills Akiha and slice him in half in a single stroke. Finally, Kohaku's route features an aversion, when Akiha seems to murder Kohaku in cold blood, Shiki loses any semblance of reason and attempts to kill his own sister. In the end, despite all the wrongs Akiha has committed against Shiki during the course of the route, Shiki still finds himself unable to kill her, realizing that, no matter what she's done to him, she's still his irreplaceable sister. In fact, he even cries when he realizes this. Luckily, as it turns out, Akiha was unable to kill Kohaku either, so all's well that ends well.
Occasionally occurs as a plot device in the Final Fantasy series, often against the villain. Often enough though, the character dies afterwards. An example is Tellah in FF 4.
Edge in Final Fantasy IV as well. It's what unlocks the ability to use his Ninjitsu techniques after Rubicante taunts him about letting his emotions get in the way.
''You think our rage... a weakness? Then let me show you how wrong you are!
The Berserk Status Effect is this. It gives a character boosted attack, defense, and speed stats in exchange for them only using physical attacks and being controlled by the computer.
Happens before the plot of Drakengard, so the protagonist is in almost a constant state of Unstoppable Rage throughout the game. His rage abates by the time any of the endings roll around, but hey, most of the people are dead anyway.
It doesn't abate for long. Although by the time the sequel comes around, he has a very good reason to be pissed off. You'd probably be mad too if your pact partner was imprisoned and tortured for eighteen years after she voluntarily sacrificed herself to become the new Cosmic Keystone.
The attack Rage was unstoppable in Pokémon Red and Blue, and Yellow, only stopping if the Pokémon using it is switched for another one or has an attack used on it that prevents attacks. However, starting with Gold, Silver, and Crystal, the attack doesn't have to continuously be used, though doing so increases its attack power when the user is attacked.
Similarly, the Dragon-type move Outrage was added in Gold and Silver—the user is locked into Outrage for two or three turns, and can't be recalled unless the attack is cancelled by a move that prevents attacks. Moreover, it was buffed in Pokémon Diamond and Pearl to become one of the most powerful Dragon-type moves available. As of Pokémon X and Y, however, it's anything but unstoppable, as the new Fairy type is completely immune to Dragon type moves, which means they can freely switch into a Pokemon that's stuck using the move and potentially punish them.
There's also Hyper and Reverse Modes in Pokémon Colosseum and XD, respectively. Hyper Mode heightens the critical hit probability for Shadow Rush (which doubles both the damage and the recoil), but makes the Pokemon unlikely to use any other attack. Reverse Mode trades the bonus for a heightened probability to obey another attack command, but the Pokemon in it sustains end-of-round damage for as long as it's in Reverse Mode. In neither mode can healing items be used on the Pokemon in question, and the conditions even persist after treatment at a Pokemon Center! The worst part of all: the closer a Shadow Pokemon is to purification, the more likely it will go into these modes.
Having your Shadow Pokemon go into Hyper Mode is actually a good thing, since snapping them out of it is a fast way of purifying them.
The Anger Point Ability quadruples the user's Attack when struck by a critical hit. The three Pokemon that can have this naturally? Mankey, Primeape, and Tauros, none of whom are known for having very good tempers.
IGN, when revealing the Shamar trailer for Sonic Unleashed, left this caption for it, as well as an icon of the Werehog:
He may not be green, but you won't like him when he's angry.
Alma. She's dead, and her hate is what keeps her present on this mortal coil. One character in F.E.A.R. 2 even says that her hate is the reason she just "refused" death.
At multiple points in Project Origin, Alma attacks and slaughters people without warning in random spats of sheer violent hatred, complete with her distorted voice screaming " I HATE YOU!" over and over again.
In Knights of the Old Republic, both the party member Hanharr and the PC (if you choose the Sith Marauder prestige class) can fly into this. While Hanharr has to eat the defense penalties involved with a rage, the PC at endgame is generally more or less immune to ranged fire.
It's worth noting that in his Wookie Fury, Hanharr can tear through even Dark Jedi without taking any significant damage.
At the end of the Marine campaign in Call of Duty: World at War, if you let Sergeant Roebuck die, Private Polonsky will go mad with rage at the Japanese. Also a cross between Cutscene Power to the Max and an Informed Ability; his emotional state is clear from his spoken lines, but his behavior as a friendly NPC in terms of game mechanics stays the same.
On the opposite side of the morality scale, we have Raul Menendez in Call of Duty: Black Ops II, who, upon being torn away from his sister, Josefina, goes into a blind rage. This mad dash comes complete with anime rush streaks when sprinting, superhuman bullet-sponge-osity, and the ability to "reload" his shotgun simply by throwing it away and picking another one up from the dead soldiers he just killed, all in the space of two seconds. And yes, it is as much fun to play as I made it sound just now.
In the Halo series, Ultra Elites and Brutes will berserk and rush you with deadly melee attacks if the rest of their squad is wiped out, or if they are pissed off enough(eg from being stuck with a plasma grenade). In Halo 3, Grunts will "kamikaze" with plasma grenades in desperate times.
When its "blood brother" is killed, the other Hunter will immediately attack whatever enemy who stands in its way, attacking them like an enraged elephant without using the arm cannon, just its shield swinging it like a bat.
In Left 4 Dead, the Tank special infected is the literal embodiment of this trope. The second the Tank sees you, it will not stop attacking you unless all the survivors are dead or incapacitated, it's dead, you get out of sight and don't get hit for upwards of sixty seconds, or you get into the ending safe room. In the case of getting out of sight, the tank dies due to frustration. Oh, and don't try hiding in the beginning safe room. It will bust the door down and beat the everloving crap out of you.
Tony Montana in Scarface: The World is Yours has turned his mercurial temperament into a Limit Break the game calls Blind Rage. Starting off from the climactic shootout at his mansion which serves as a junction point for the game's Alternate Universe premise Tony can build machismo and brashness (in increments measured in Balls) until the Charge Meter tops out, at which point he can break out into his trademark burst of obscenity-spewing rampage where not only he can autotarget enemies For Massive Damage with any weapon or even his fists, but every enemy killed during the Blind Rage results in a partial restoration of Tony's health. Tony can increase not only his incremental Ball gains, but also the duration of the Blind Rage throughout the game.
The instruction booklet put it best, "Nobody flips the fuck out like Tony Montana".
In Baldur's Gate 2, hulking, amiably insane ranger Minsc is desolate over the loss of Dynaheir, the witch he swore to protect. Then, if you allow Aerie to join your party, he forms a similar attachment to her and offers to protect her with his life.
He also has a berserker rage option in combat. It can be a problem, because he regularly just wigs out and forgets who's a member of the party and who's not. He does, however, get points for shouting "I will inspire you by CHARGING BLINDLY ON!"
Meta Knight had one of these moments during the "Revenge of Meta Knight" Mini game in Kirby Superstar. At the end, during the final escape scene, Meta Knight enters by shouting "YOU WILL NOT ESCAPE!" and than proceeds to chase you hurling swords at you at every chance he has.
Also, the Daedra Lords should you fail one of their quests, especially if you choose not to return Umbra to Clavicus Vile.
In the Shivering Islands, Sheogorath has a few of these, though they are mostly funny.
Though you don't see it, Falcar supposedly had one before leaving the Mages Guild in Cheydenhal.
Somewhat used for Don Flamenco in the Wii version of Punch-Out!!. When you knock his toupee off his head, he will get so pissed that he will constantly throw punches at you until he goes down, you go down, or if the round ends.
"You really do remember me this time? I'm soooo FLATTERED!" (Cue flames rising, weapons appearing out of nowhere, and a scary guy with red, spiky hair giving you a Slasher Smile) "But you're TOO LATE!"
"You both...think you can do whatever you want...Well, I'm sick of it. Go on, you just keep running. But I'll always be there to BRING YOU BACK!"
When its seemed that Goofy died, Sora, Donald, and King Mickey immediately attacked The Heartless horde with much more ferocity. The rages of Donald and the King was clear, such as Mickey saying "They'll pay for this" and then rushed right at the horde with his keyblade at his hand, with Donald and Sora right behind him, and they curb-stomped at least 1000 heartless each.
Then there's Terra's. It reanimated his armour just to fight the guy who had possessed him and the musical theme accompanying this battle? Its (very fittingly) called Rage Awakened.
Played straight in World of Warcraft, whose Warrior and Druid(bear-form) classes require a constant supply of Rage to fuel their attacks.
Likewise with the Hunter talent, Bestial Wrath, which causes the Hunter's pet to do this (Again, without feeling "pity or remorse or fear"). A further talent allows the Hunter himself to share the rage.
Even straighter in Runes Of Magic, where warrior classes use Rage energy to attack, have a self buff increasing how fast they become enraged, potions also increasing rage, a straight up rage button, and two abilities that are essentially "I'm pissed so I'm going to hit you harder now." buttons.
In Watchmen: The End Is Nigh Rorschach has a literal Rage meter that fills the more bad guys you pound and gives you special, extra-brutal attacks.
This is what happened to Mother Brain at the end of Super Metroid.
In the Rome: Total War expansion pack, Barbarian Invasion, some barbarian factions make use of berserker units who possess the special ability to enter an Unstoppable Rage.
Panicked war elephants and chariots may also qualify for this.
Hopeleslly surrounded units may choose to "fight to the death" rather than flee.
While very short, Junpei's Persona evolution in Persona 3 very much qualifies, as he Screams in rage at Takaya killing Chidori, summons Hermes which subsequently evolves into Trismegistus for all to see, and blasts Jin off his feet, showing that he'd quite happily rip them both limb from limb if his friends didn't talk him down. This is even more notable by way of remembering the rules of fighting in the game: Junpei used Agidyne, a fire spell he could not actually possibly have learned at that point, and the sheer power of his burning passion allows it to knock down an enemy previously noted in-battle as being immune to fire.
In American McGee's Alice, Alice can find Rage Boxes, which represent her anger over the death of her family; if she uses one, she howls in pain, her skin turns blood red, horns grow on her forehead, spurs grow from her back, and her hands turn into horrid claws - for a limited time. In game terms, this is a Power-Up that makes Alice do more damage to enemies, and requires her to spend less mana points for her attacks. (Most of the time, there's only one Rage Box per level, and sometimes there is none; the player can save them for when they are needed.)
Diablo 2 has the barbarian's "frenzy" attack, causing the character to attack and run faster and faster as they attack enemies.
The Diablo III Barbarian has Wrath of the Berserker, essentially a Super Mode for the character that allows him or her to attack faster and harder.
Unrelated, but the Crusader is powered by Wrath.
Alex Mercer is in this state for at least a quarter of the game.
"NOTHING CAN PROTECT YOU FROM ME! NOT MEN! NOT WEAPONS! NOT ARMOR!"
"DIG IN! LIKE IT'S GOING TO MAKE A DIFFERENCE!"
Heller has one in in the sequelwhen assaulting the Gentek HQ to get back his daughter. He was capable to force two Juggernauts to his aid and his damage output is dramatically increased to the point of being able to kill Orion soldiers and Brawlers in one hit.
Ragna the Bloodedge: Got his sister kidnapped, his brother brainwashed and his arm torn off. Response? Annihilate the world government and slaughter every single individual associated with it. By the way, this guy is supposed to be the hero of the game.
Noel Vermillon: Don't ever, EVER mention her lack of "assets". If you're lucky, she'll put you under arrest. If you're less lucky, she'll put those guns of hers to good use and some bullets in your head.
Jin Kisaragi: Don't be Noel Vermillon. Just don't. It's a commonly agreed upon fact that it's not a very good idea to be her in his presence. Also, hurt Tsubaki in front of him if you want a cold, slow, painful death.
Hakumen: Never EVER so much as scratch Tsubaki in front of him. If you do, he goes from being fueled by justice to complete and utter hatred. Too bad this causes his downfall in his Continuum Shift bad ending.
Kokonoe: Terumi is a berserk button by simply existing. He not only knows this, but he constantly provokes her by reminding her of her mother and that he killed her. If he so much as says her name she'll give Tager (or Lambda depending on who's there) a good old fashioned "Kill that son of a bitch!!!" order.
Valkenhayn: Don't insult, threaten, or (god forbid) hurt Rachel. Insults irritate him, threats make him hostile, and hurting her will have him in your face in no time flat.
Hazama: Normally, he's the one trying to draw this reaction from you. But if you give him the idea you're toying with him, he'll skip to killing you. And if you have any knowledge the containment of which is vital to his plot, well...
Restriction 666 released! Dimensional interference forcefield deployed! *laugh* I'll show you the true power of the Azure! Code: S.O.L.! BlazBlue, activate! Let's go, you little bitch!
Silent Hill 3's Heather, who is normally a clean-mouthed and calm person, does this near the end of the game to Claudia Wolf in a fit of pure rage before she begin to birth the goddess.
"SHUT YOUR STINKING MOUTH, BITCH!"
Dwarfs in Dwarf Fortress get a double dose. If they get annoyed enough (by bad weather, friends' deaths, swarms of flies, etc.) without enough to make them happy (well-cooked meals, talking with friends, cute pets) they go on "tantrums" where they randomly attack other dwarfs, break furniture, or pull levers until they calm down from the catharsis, and hopefully before they provoke another dwarf into a tantrum. In combat, they can occasionally go into a "martial trance" that significantly boosts all their offensive and defensive combat skills.
It goes further. One step up from "tantrum" is "berserk rage", which will make your dwarves really fuck shit up. As in killing other dwarves, breaking workshops, hitting levers and all that until either the military or the fortress guard take them down (usually, the take-down is permanent...). The phenomenon known as "martial trance" is more like Tranquil Fury, all things considered. The OTHER kind of rage status in combat, simply called "enraged", is triggered when a dwarf in the squad (or a dog) dies. At least one if not a few dwarves around the recently deceased will do some kind of acrobatic somersault off the handle - but this time, those tiny drunken sociopaths target the enemy. Splattering ensues. One user set the probability for dwarfs to enrage extremely high. Then, he let three dwarfs storm onto two trolls. The speardwarf enraged, ran to them, beheaded one (WITH A SPEAR) and killed the other with a stab through the heart before the other two dwarfs even reached him.
Asura goes from "pissed off" to "pissed off enough to punch a planet-sized Buddha to death" to "pissed off enough to not care that my arms have shattered" to "pissed off to the point that I'm indiscriminately firing nuclear-scale explosions into space."
Of note, however, is that in spite of Asura's wrath being a terrifying and unstoppable force, he is at the same time not a mindless force. Even when completely lost within his own sheer, violent, supreme hatred, Asura still refrains from harming innocents and noncombatants. But anything he perceives as an enemy — such as the Gohma or the Seven Deities and their soldiers — are targets.
Grolla Seyfarth of RosenkreuzStilette is generally calm and collected and is every bit as strict with others as she is with herself. But what happens if you hit her Berserk Button in any way? Cue Unstoppable Rage. She'll go on a Roaring Rampage of Revenge and won't stop until she finally has her revenge.
Rink Refraktia's generally lively and outgoing, but if you hit her Berserk Button by messing with her older sister Lecht, she'll stop at nothing to remove you as a threat.
Tryndamere in League of Legends has the ultimate ability Undying Rage, which makes him temporarily impossibly to kill and cannot be prevented from being cast.
Olaf played right is this. His ultimate removes crowd-control effects as well as making him immune to crowd-control effects and reduces damage taken for its duration, his passive increases attack speed for the % of health his is missing, and another choice ability to this in one which increases his damage and gives him Life Drain based off damage he does for a duration. Timed right, he will be a unstoppable and furious attacker where attempts to kill him just cause him to do more damage due to him not hitting Critical Existence Failure. Timed wrong, well... it probably won't be worth the try.
And then there is Renekton, who at this point feels nothing but rage.
In Star Wars: The Force Unleashed II, Starkiller experiences this when Darth Vader shoves his Love Interest Juno Eclipse out a window. It begins with Starkiller going into perpetual Force Fury note it is only cosmetic, attacking Vader with all his might screaming that he will kill him, and ends with Starkiller saturating his foe with lightning for two minutes straight.
The Fire King in Odin Sphere. What sets him off is not being able to make Gwen love him and the end of the world prediction that his rage actually sends him into playing his role in it to end up being stopped by the world tree. He takes entire kingdoms down in his rage.
Bakumi Moriyama of Crimsoness. And when one bad day sets her off, everyone will pay.
After Handsome Jack kills Bloodwing in Borderlands 2, Mordecai flat out loses it. Complete with blood-curdling yells of rage, and annihilating a group of bots Jack sent after you, in about 10 seconds.
The Goliath class of enemies are made of this. They're basically just giant mutated bandits who seem tame enough...until someone shoots off their mask. Do this and they will drop their guns and reveal their hideous shrunken head, then get mad and go on a bare-fisted murder spree against everyone in the area (friends and enemies) until they die. They can even level up and become stronger by killing off their fellow bandits, with an instant health refill to boot.
The Fleshpound in Killing Floor looks like a Giant Mook with rotating maces for arms at first. If you inflict enough damage to trigger it, the medical pump on his chest will turn red. What does that mean ? That means he runs twice as fast and will pummel anything between him and the player who pusehd him. With gory results.
Technically occurs in Vampire: The Masquerade - Bloodlines. If you lose too much humanity you may go into frenzy mode. On one hand, it makes you nigh unstoppable, boosting your skills and power exponentially. On the other hand, it's exactly as one would describe a "frenzy"; you don't control the character until it's over and will likely have lost most (if not all) Masquerade points from running around biting everyone, meaning powerful vampire hunters will be attacking your now-weakened form.
Here's a sick wrinkle to Rage Mode in Dead Island. Rather than turn the survivors into a zombie, the kuru virus makes this a game mechanic. Usually it can be triggered at will, but a couple of times they have no control over it and it forces them into an Unstoppable Rage, leaving them freaked upon recovering and seeing the massacre they were responsible for.
Link goes from Determinator to this in the finale of The Legend of Zelda: Skyward Sword, after Ghirahim captures Zelda and starts a ritual to feed her soul to Demise. He's so pissed he tears through an army of Bokoblins like tissue.
Golden Sun features a literal example of unstoppable rage: Tret the holy tree was rightfully pissed off when the people of Kolima village started cutting down trees, especially considering the lumberjacks also tried to cut him down, severely wounding him. However, his anger reached truly uncontrollable levels when Psynergy stones started falling from the sky. Their powers amplified his anger to a point that he didn't even have control over his own actions anymore, and he started turning all the people in Kolima into trees, wanting to spread the curse around as much as he could, and leave them to wither and die like he was about to. After Isaac and his friends kick his ass, Tret returns to his senses.
Complains Of Names from Goblins, a barbarian, after Chief's torture and death at the hands of Kore. Kore ticked off the bull and now he's getting the horns!
In Hookie Dookie Panic, Adda pulls a few of these, the biggest being when she loses a Dance Dance Revolution tournament due to a fight going on, and she proceeds to go into a psychotic rampage and kill those responsible for the fight.
Few days ago, in Sam and Fuzzy, Mr. Blank had his moment of Unstoppable Rage against Mr. Black, at least in the beginning. The funny (or creepy) thing is, the audience could already sense the doom months ago.
Averted in Sluggy Freelance. Torg appears to go into one of these after Horribus kills Alt-Zoe, but, in a rare moment of rationality, he realizes saving the world is more important than a grudge match, and runs away instead.
Girl Genius has this for its Sparks. When they get in the Mad Mood, they unleash all their most devastating gadgetry and can throw around clanks single-handedly. However, it is said that this is also the reason for most lower level sparks' deaths. They get in a rage without the ability or sense to keep themselves from dying.
Tarvek flies into one of these while fighting Zola, beating her to the point where she tries to surrender - only Tarvek isn't listening to silly notions like that.
Agatha goes full tiltafter Lars is killed. Thank goodness for Sparky pies.
Dr. Jean Poule in The Inexplicable Adventures of Bob! can go from adorable Girl Next Door innocence to blind fury without too much trouble. This rarely manifests as physical violence, as the mere force of her yelling is usually enough to produce results (i.e., Bob: "Wow! Thanks, Jean! You're swell at yelling at people!" Jean: "Well, the secret is to enjoy it...") but it has gotten her into fights upon occasion.
In Slightly Damned, Buwaro was born with permanent Unstoppable Rage. The only reason he's so happy-go-lucky is because his star pendant keeps the rage in check.
Karkat Vantas walks around in a state of perpetual ire and will verbally tear into anyone with little provocation, so it's kind of a subversion that he doesn't do this.
Gamzee Makara's title is the Bard of Rage. From all accounts, it manifests as him being nigh-unstoppable when he gets going - he is said to have dealt the most damage to the Black King with just one strike, and that was when he was high. Whenhe'ssober, this trope is more or less his default state. To wit: what he did to Nepeta...
Eventually however, Gamzee's rage is stopped by Karkat via a Cooldown Hug.
Rose enters one after learning that Bec Noir had killed her mother. Seeking revenge, she well and truly loses it when he kills John at the very beginning of the battle, prompting her to destroy a large percentage of the battlefield in an attempt to kill Bec Noir. This being Homestuck, Rose's attempt is in vain and she eventually gets killed (and to add to insult, she did no damage to Bec Noir.)
Bec Noir goes into this after Jade dies again, and slaughters most of the Trolls' Dream Selves in their session.
Such as Adam Dodd going ballistic on Cody Jenson near the end of V1, who he has every reason to want dead.
Sailor Nothing: although Himei usually just wills her opponents into non-existence, she has been known to tear them apart with her bare hands if put under sufficient emotional stress.
While it is debatable whether Nist Akath of Dwarf Fortress falls under this or Video Games, the scene where Ironblood is betrayed by the nobles certainly springs to mind. Ironblood is poisoned by the nobles who are servants of an evil god, stripped naked, and thrown into the arena he himself ordered costructed. Then, to kill him, they release a hydra to kill him. While naked, poisoned, and vomiting, Ironblood kills the Hydra with his bare hands. By crushing its skulls. Then, he climbs out of the arena, and... well...
"As he watched the dwarf crushed his wife's form, he came to a sudden, horrid realization. Ironblood didn't use an axe because he needed it. He used it to be kind. And right now he wasn't being kind."
Badfic is so horrendously bad that unstoppable rage is a common reaction for Protectors of the Plot Continuum agents, especially when a favorite canon character is threatened.
Parodied in Linkara's review of Wolverine: Adamantium Rage.
Caboose tries to intentionally invoke this in himself when he and Sarge are trapped in a bizarre land of eternal war in Red vs. Blue. 'I am Michael J Caboose ... and I HATE BABIES!' Followed by 'Hurk! Blagh!' repeatedly.
Comes back in Season 10; as the Blood Gulchers are lining up for a battle, Church says he needs Caboose to get a little angry; Caboose replies that he forgot how to do that. Church helps him remember, and Caboose charges headlong through a massive group of Tex copies.
From The Gamers: 'Barbarian rage! Blood, death, and vengeance!'. Success rate? 1 for 2.
And in 5, Dust does Snowball one better after killing him under the influence of the Psycho Serum that Smoke had injected into him by completely devastating Smoke's army of mooks, wrecking his helicopter gunship as he tries to get away and then sending the bastard right through its rotor blades.
In Fine Structure, a series of otherwise normal humans acquire Flying Brick powers. In each case, for the first 15.8 seconds after getting their new powers, they are stuck in an absolute berserker rage wherein they immediately attempt to obliterate anything and everything around them. Since they also perceive time at an accelerated rate, this gives them long enough to kill millions of people if the local population density is high enough.
The Angry German Kid, which is a staged performance of a kid getting angry after his computer breaks, and then he proceeds to scream and throw his keyboard across the room.
Along with his better-known abilities, SCP-682 is noticeably prone to these. Given that he's unstoppable even outside his rages, this is a bad thing.
SCP-096. When someone sees its face(It doesn't matter if it's in person or 4 pixels in a picture) it will enter a homicidal and unstoppable rage that won't end until the person who saw his face is dead.
Among the boards of 4chan, /v/ is (rightly) the butt of many jokes as being rage incarnate...
Arthéon in Noob Season 4 finale, after Kary turns out to be more interested in the new game content than in their wedding ceremony.
In Episode 18 of Dragon Ball Z Abridged, when Vegeta discovers that Gohan stole his dragon ball, he completely loses it. His scream of rage can be heard over the entire planet, in space, in the afterlife, and on another planet in another solar system twenty years in the future. When he catches up to Krillin, he's been driven temporarily insane, his perception of color keeps changing, and he's shouting at Ghost Nappa. Gohan receiving a power-up from Super Kami Guru is the only thing that saves Krillin from a horrible death.
The Ryuujin weredragons of Guardians Of Luna are occasionally consumed with rage and the desire to do battle.
Biker Mice from Mars: The last person who threatened Modo's bike was sucker-punched into Lake Michigan.
Parodied in the episode "Conjoined Fetus Lady": After timid English doormat Pip is insulted by the Chinese dodgeball team, he wipes them out with a single throw.
Kyle in "Tonsil Trouble".
Subverted in Avatar: The Last Airbender: Like the G-Gundam example, Aang can gain superpowers through intense anger, but they're imperfect (and really hard to control) that way; he's supposed to trigger the "Avatar State" through meditation and Buddhism-like detachment. What's more, despite the power Unstoppable Rage gives him, he also risks being made Deader than Dead if he's killed while fighting that way (normally he'd reincarnate). Also, in complete contrast to the result of the first season finale, the climax of the second season finale confirmed that even in this form, he is quite far from unstoppable. It did help that during the first season he was teamed up with the massively P.O.'d spirit of all oceans.
However, the final fight of the series has Aang regaining, and then finishing controlling, the Avatar State after it had finished tossing around a supercharged Ozai like a ragdoll in time to prevent it from killing him.
Used again when Avatar Roku assists Aang and tears down a Fire Temple around the treacherous monks within.
Happens when Cat from CatDog snaps at a Monster Truck Rally.
Heroes and villains alike in Transformers tend to do this a lot, with varying degrees of success. Biggest, oddest example: In one episode of Beast Wars, a cybervirus that was supposed to turn Optimus Primal into a coward instead made him a berserker who smashed up the good guy base when they attempted to hold him back, then stormed the enemy base single-handedly.
Brock Samson from The Venture Bros. has a hair-trigger example of an unstoppable rage.
Ren Hoek of The Ren & Stimpy Show would fly into a rage whenever Stimpy would do something mildly annoying and often beat him. But if anyone else was involved, being a chihuahua, Ren was so weak that he was more likely to be beaten as a result of these than anything else.
Except for one episode, "Man's Best Friend" (which was banned from Nickelodeon in part because of this), in which Ren, bought by George Liquor as a pet/guard/show dog, is pushed to the brink, and proceeds to beat George to a pulp with a boat oar, laughing maniacally as he does it.
This happens again in the Adult Party Cartoon episode "Ren Seeks Help", in which, after Mr. Horse insults his sanity one too many times and threatens to kill him, he transforms into an insane wild animal and proceeds to beat the crap out of him and eventually beats him to death with his gun. Nothing could snap him out of it and he's sent off to an insane asylum, not before biting off one of the guards' hands.
Numbuh Three from Codename: Kids Next Door. Usually, she's a sweet, innocent, little girl, but when she truly gets angry, anyone who has known her for long cowers in terror, she develops Fireball Eyeballs and sometimes Scary Teeth, and enough raw power to beat up even Mr. Boss, a Big Bad Duumvirate of the series. (As seen in "Operation: M.A.C.A.R.R.O.N.I.", where they get into a huge fight over a piece of macaroni art that he wants for dinner.)
Donald Duck. When people or animals have annoyed him too much, he's raged to the level of extreme violence, although he's always managed to stop himself before killing anyone, though not before doing any damage (or more likely, destruction) to property. He manifests this trope to such an extent that he's often depicted with the features of a devil while in this state.
In "Donald's Double Trouble," he finds out his "double" is kissing Daisy in the Tunnel of Love and nearly destroys the entire ride! The cartoon ends with Donald and his doppelganger running from Daisy, who is having her own furious temper-tantrum when she discovers she's been deceived.
"Donald's Happy Birthday": When Donald sees Huey, Dewey and Louie with a box of cigars they bought with the money that he had spent the whole trying to keep from them, he sadistically forces them to smoke the whole boxful as punishment, not realizing, until after the fact, that they were actually meant to be a birthday present for him.
"Donald's Rocket Ruckus": When Huey, Dewey and Louie sneak on board the ride Donald is operating after Donald's readjusted the height requirements so they can't board, Donald gets so ticked he spins the ride out of control. It gets worse from there.
"Tapped Out": Donald demolishes Pulchritudinous Pete after the latter accidentally ruined his nachos, after he had made it clear that no one was to so much as touch them.
Toki Wartooth in Metalocalypse. With accidentally causing the death of his father, he was already pretty unstable. It's when a really annoying fan won't leave him alone at a concert that Toki finally snaps, beating the fan to death with his bare hands.
Kim Possible and Shego get tagged with emotion-controlling moodulater chips. The device control gets broken when it's set to "anger", leaving them locked in what the chip's inventor describes as "an irreversible frenzy of rage".
Buttercup will go into one of these if someone makes fun of her, threatens her sisters, or calls her cute.
The "threaten her sisters" part could be applied to all of them, as Blossom opened a can of whoopass on Princess after she knocked out Buttercup and Bubbles.
Bubbles in the movie went Trigger Happy with her lasers on Mojo after he grabbed Blossom and Buttercup and started trying to squeeze them to death.
Bubbles does this in "Bubblevicious" to prove to her sisters that she's not a baby.
In the pilot "Meat Fuzzy Lumkins", after Fuzzy's meat gun turns her pigtail into a chicken leg, Bubbles clobbers him.
In the "Low Tidings" episode of The Marvelous Misadventures of Flapjack, Captain K'nuckles is revealed to have had a traumatic childhood experience on Low Tidings Day in which a group of mermen stuffed him into a sack for not being a good person (as is tradition for all of the bad people in town). When K'nuckles plays the part of the "quiet boy" in a Low Tidings pageant in an attempt to be a good person, the other cast members have him stuffed into a sack for the same offense. Needless to say, the pageant was doomed from that point forward.
Audience Member: He has the strength of ten quiet boys!
In Ultimate Alien, Ben completely loses it after Aggregor killed five aliens and absorbs their powers. At one point, Humoungosaur throws a house at Aggregor, and gives him a No-Holds-Barred Beatdown. And yes, this is thatBen Tennyson!
The ones who you have to worry about are Beast Boy and Raven, who, when pushed over the edge, are capable of wiping the floor with Slade, who Robin could only match in hand to hand combat. Then again, what would you expect from pissing off a half demon or someone who can turn into any animal that has ever existed?
Robin will also go into a rage when compared to Slade, the Big Bad.
All of the Titans can be pretty nasty when pushed, which is proved in "The End Part I", when they go to all ends to protect Raven from Slade. Starfire can gather massive amounts of energy and unleash it in a big blast, Beast Boy apparently learned to turn into that man-beast thing at will and beat up anything, Robin turned his birdarangs into swords (a feature we see for the first and only time, and Cyborg turns into a walking cannon! He drains the tower's power supply to fire a massive blast at Slade and his army, very nearly succeeding, too. The Titans are not to be fucked with.
Sym-Bionic Titan: Lance does this after Octus is electrocuted. He ends up taking over G3's ship and let loose everything it had into the monster and the space station, vaporizing it completely. Even Solomon, who is just as Badass as Lance is, knew it was a good idea to stay out of his way despite the fact his ship had just been hijacked.
In the Peter Pan & the Pirates episode "First Encounter", when it appears that Captain Hook has fed Nibs and Toodles to the crocodile, Peter gets very upset. Hook mocks him for it; Pan then flies into a rage and attacks Hook more intensely than he had ever before, ending when he knocks Hook's sword out of his hands. Peter then uses it to cut off Hook's hand.
Mirta from Winx Club is referred to as creating "illusions powered by emotions". When the Trix try to kill Stella, Musa, Flora, and Tecna, Mirta rages out and conjures up a gigantic nightmare thing in front of them; not only does it scare the bejeezus out of Stormy and Darcy (which causes their spells to fail and free the Winx), but even Mirta gets a little freaked out by what she's done. Good thing she's a wallflower most of the time . . .
In fact, after the multitude of lesbian hook-ups, the post-first-season fanfiction storyline that was most popular was Mirta letting all her anger out and leaving huge trails of traumatized teenagers and scared-literally-to-death corpses in her wake; most of them had her only using illusions to accomplish all this.
Chimera, a minor villainess from Season Three, had a fearsome temper that made her magic stronger. Her only named spell used in the show summoned a huge storm, and was insanely powerful because she cast it in the middle of a monster rage-out.
Benson from Regular Show had a few and well known unstoppable rages in Prank Callers (when Mordecai and Rigby were prank calling him), Jinx (when Rigby kept throwing trash at him), and Think Positive (majority of the episode).
Also Skips in Over the Top.
A schizophrenic will occasionally have a fit of "Hulking out"; they cannot experience pain during this fit, nor will they know what's going on around them. It's actually quite saddening, when you think about it...
Some forms of Pervasive Developmental Disorders feature this as well; it's called a "werewolf" state.
It can happen with drugs as well (such as Meth "tweaking" and PCP aka Angel Dust)
This has the unfortunate side effect of killing many users. While mostly a myth, police have had to 'put down' an assailant because they couldn't be taken without severe risk to the officers in question or civilians. Depending on the user, he/she can lose the sensation of pain, meaning other methods of coercion like pepper spray won't worknote As for tasers, which are supposed to work physically, there is no clear evidence and plenty of anecdotal evidence either way. It's not as common as many sources say, but it does happen. Unstoppable rage does not equal bullet proof.
'Roid rage doesn't happen as often as people believe. But some users experience severe aggression spikes. See the Lifestories: Families in Crisis "A Body to Die For: Aaron Henry" for a direct account.
What's more amazing is that he did something like this again, although the second time around was more of the Tranquil Fury variety. In a French battle about six months later, by this time Second Lieutenant, after having sent the remaining 19 of his original unit of 128 men to retreat and take cover, he jumped onto a disabled and burning tank destroyer and proceeded to use the .50 cal machine gun to hold off the approaching Germans for an hour during which time he was shot in the leg but kept going. The day before, he had also taken some shrapnel from a mortar that had killed two nearby men in his unit.
The number of unbelievable things Audie did during WWII has to be read to be believed. He had balls of adamantium-plated depleted uranium and was as close to actually being Wolverine as anyone in real life could be.
Adrenaline will make anyone faster, stronger and more likely to ignore pain and such. Such as when you put a person or animal into a life-threatening situation they can't run away from.
There is some truth to the phrase 'Strength of a Madman', our muscles have actually hardcoded to not function to full power to avoid damaging the skeleton. Madmen in fits of rage have shattered their own bones by punching that hard.
There was one famous case where a mountain climber/hiker was pinned under an enormous slab of rock. His body went into survival mode, where he pushed the slab off of him. He exerted so much pressure that his muscle was torn from the bone in his arm. For reference, the rock this moderately-built hiker pushed off of himself weighed over 700 pounds.
Marion "The Barbarian" Barber of the Dallas Cowboys and Bob Sanders of the Indianapolis Colts are two NFL players whose style has been described as such. Unfortunately, for the latter this has left to a number of serious, often season-ending injuries.
hide, late X Japan guitarist, was allegedly prone to these. One incident, mentioned by Taiji Sawada in his band autobiography, referred to hide going into a drunken rage, and fighting with hotel deskpeople....
Taiji Sawada himself, and the official story is that this is what led to his arrest (after which he subsequently died a suspicious death in custody): he had apparently gotten so angry at his manager over her stealing from him that he chose to pick a fight with her. On an airplane...which did not end well for him.
Male elephants in a state of musth become hyper-aggressive and nearly impossible to control.
Ditto for any (unneutered) male ungulate in rut, e.g. bulls.
It gets better. The one she killed was the leader of the terrorists. There was a decent reward on his head, and it was given to Rukhsana.
Léo Major in Zwolle during World War II. After his friend, Willie Arseneault, was killed by a German sniper outside a bunker, he went into a rage, killing two of the soldiers inside before the rest fled, leaving behind a munitions dump. He used the captured munitions to liberate the city of Zwolle of the remainder of the night.