[[caption-width-right:350:[[{{StoryBreakerPower}} You really are way too strong.]]]]

With a series about a man who can beat anyone with just one punch, it's inevitable there'll be tons of awesome moments.

!Introduction Saga
[[folder: Saitama Introduction Arc]]
* While yes, Saitama can NOW kill monsters with a single punch, perhaps his greatest moment of badassery so far is in the second chapter, during the flashback of his fight with a crab monster. This is when he was just an ordinary guy with no powers. Said monster is initially wiping the floor with Saitama, until Saitama loops his necktie around one of the monster's eyes, and rips it out.

%%[[folder: House of Evolution Arc]]


%%[[folder: Paradise Group Arc]]


!Hero Association Saga
[[folder: National Superhero Registry Arc]]
* The "Sparring" two parter with Genos. Genos goes for a massive blast that Saitama appears to dodge, but Genos was expecting that and charges at him landing a rain of punches that tear apart the side of a mountain just as his previously fired blast hits. Only for him to discover that what he tackled wasn't Saitama but an [[SpeedEchoes after image]].
** How does the spar session end? [[spoiler: Adhering to the rules not to hold back, Saitama prepares to [[http://www.mangareader.net/onepunch-man/18/10 punch Genos]] but pulls back and hits him with a forehead flick at the end. The after effect of his attack still manages to destroy the mountain behind the two completely.]]
** Now in [[http://i288.photobucket.com/albums/ll163/zelkstone/Saitama%20DEATH%20Punch%20Sparring.png Anime]] [[http://i288.photobucket.com/albums/ll163/zelkstone/Punch%20Aftermath.png Form]].
* Genos actually looks fairly badass during the match, such that even Saitama seems to think he looks pretty cool while they're fighting- sure, Saitama would destroy him easily, but for a man whose technique involves super-powered normal punches, it's easy to see why Saitama likes Genos' flashier yet incredibly destructive style.

%%[[folder: Rumored Monster Arc]]


[[folder: Giant Meteor Arc]]
* The time when the [[ColonyDrop city sized meteor]] is about to drop on Z-city where two S rank heroes (3 when you count Silver Fang) move to intercept it. Of coarse mobilizing only three top tier soldiers to [[GodzillaThreshold combat an extinction level event]], proves to be about [[RealityEnsues as helpful as one would guess]]. Especially since the best they had on the way [[GoodIsNotNice only mobilized because he was interested in testing his own arsenal]], Bang admittedly couldn't deal with this issue either and Genos was also knowingly out of his weight class given the situation.
** Metal Knight's [[MacrossMissileMassacre weapons test]] pretty flat farted and died against this colossal threat. With the former outright [[WhatTheHellHero bailing on the mission]] when realizing there's no hope of stopping it.
** Despite knowing full well how far out of his depth as he was [[{{Determinator}} Genos]] gathered his courage after thinking of his beloved sensei and set out to [[HeroicResolve stop the meteor, literally pouring his heart & soul into his next attack]]. Though unleashing a [[KamehameHadoken rather spectacular]] [[WaveMotionGun burst of raw power]], he failed to turn the tide as the meteor didn't even slow it's decent when struck by it, [[spoiler: Bang even hitting the nail on the head with his misconception of it's pace [[FunnyAneurysmMoment bemusing, then angering Genos]].]]
* Saitama earns a singular dose of [[TookALevelInBadass awesomeness points]] after stepping up to bat when [[FuelMeterOfPower Genos runs on empty]], if the [[RocketJump Sun Wu Kong moment]] of jutting a building deep into the ground just to reach the meteor overhead doesn't grab you. Watching him [[OneHitKill one-shot the thing]] causing it to explode into fragments probably will. Gets ''another one'' when [[spoiler: after destroying the meteor, two [[ThoseTwoGuys Tank Top heroes]] try to ruin his reputation, then attempt to [[BullyingADragon execute him in public.]] The result however [[CurbStompBattle was obvious]], but his speech to the [[JerkAss ungrateful masses]] that they roused on why he's a hero in the first place - "Let me make one thing clear! I'm not working as a hero to make [[UngratefulBastard you morons]] admire me! I do it because I want to!!" - was just plain awesome.]]

[[folder: Sea Monster Arc]]
* The very beginning - a giant cthulhoid monstrosity strides on shore declaring the [[FantasticRacism superiority]] of all undersea creatures, while Saitama [[ContrivedCoincidence just happens]] to be randomly walking by. Said giant octopus-monster notices Saitama and loudly declares that he will be destroyed. [[ForegoneConclusion You all know]] [[BullyingADragon what]] [[CurbstompBattle happens next.]]
* The first hero to show up on the scene, Stinger, surely deserves some credit as well, for handily and cheerfully defeating the entire first wave of fish monsters. Even when he gets injured and fatigued, he's still not done yet and not only wins against the sea creatures but ''wipes the floor with them.'' None of them even gives him much trouble [[spoiler: Until the [[KnightOfCerebus Deep Sea King]] shows up and easily takes [[TheWorfEffect ''Stinger'']] down.]]
* [[ManlyGay Puri]]-[[MachoCamp Puri]] [[BadassGay Prisoner]] is no slouch either, showing up to rescue Sonic and Lightning Max and actually ''impresses'' the Sea King himself. In a bare-knuckle brawl. Against a LightningBruiser monster with a severe HealingFactor. While [[FullFrontalAssault naked.]]
* Licenseless Rider versus the Sea King, an unpowered C-class hero against an unstoppable monster, knowing he has no chance, [[spoiler:but doing it because there's no-one else. Though he doesn't win, he saves Genos' life and buys enough time for Saitama to arrive.]] He even wins Saitama's respect for putting up a good fight.
** This is, itself, a CallBack to one of Saitama's lines, one that Genos himself thought was so important that he had to write it down: [[HoldTheLine If The Heroes Run And Hide, Who Will Stand And Fight?]]
* Saitama's fight against the Sea King. [[OneHitKill While it does end like pretty much all of his fights thus far,]] it is such an epic and devastating punch that its scope is simply... breathtaking. Even the crowd that witnessed it was awestruck. This could easily be said to be the strongest punch he has given so far.
** What makes it truly impressive is not just the power, but the SPEED! It's so fast that we don't even see the moment of the impact, just the aftermath. The anime goes even further by showing high-speed camera footage... that couldn't even properly capture the punch.
*** The anime shows the full hit not only clearing up all the rain with a huge shockwave, but ''the rain doesn't return'', meaning Saitama blew away the clouds with just one punch!
** Don't forget about the aftermath where he praised the other heroes for being there by [[spoiler: lying to the civilians that the other heroes had weakened the Sea King so he could finish it off.]]
** A few days after the fight, Saitama and Genos are sent a bunch of fan letters. Almost all of Saitama's are hateful messages telling him he's a cheater and that he should quit. Saitama's response? "Man, they need a hobby."
** Rider treating Saitama to dinner after the fight resolves a couple of days later, revealing that it was him who sent the one "Thank You" letter among all of Saitama's hate filled fan letters. Even Saitama is impressed that he would go so far to be this decent and smiles happily.
* Speed O' Sound Sonic and Genos also deserve a mention:
** Sonic was the only one to fight the Sea King and leave ''without a scratch''. This is especially impressive because unlike the other heroes before him, he was forced to fight the Sea King in his OneWingedAngel form without his weapons.
** Genos punched him through a wall and fought him blow for blow [[HandicappedBadass even after he ripped his arm off]]...which only happened because he thought he defeated him in one hit and got caught off guard. Hell, he lost the fight in the first place only because he took the brunt of an attack directed at a child!

[[folder: Alien Conquerors Arc]]
* From the anime: Tatsumaki's fighting a giant Godzilla-esque lizard. The monster [[TemptingFate boasts that if she wants to kill him]] she'd need to [[ColonyDrop drop a large meteor on him.]] Tatsumaki does exactly that, and only a molten skeleton is left afterwards.
* [[LittleMissBadass Tatsumaki]] ''stopping'' a whole bunch of huge artillery shells thanks to her psychic powers, and ''sending them back to the Alien starship which fired them'' like it's nothing.
* Saitama gets punched to the Moon. He ''jumps back''.
** Even better, Boros not only watches when Saitama returns to Earth, but ''stands'' there, speechless and wide-eyed for several seconds as he tries to process what he just saw.
** Of particular note is that Saitama jumps back to Earth and lands right where he needed to be, a feat of incredible accuracy in itself. Saitama's strength is often talked up, but the sheer precision he'd need to send a projectile the size of a human being across the distance between the moon and Earth, to land at that exact spot on a target that's literally the size of a planet, is mind boggling.
*** In the anime we even see Saitama pick up a moon rock and bounce it up and down a bit, ostensibly to gauge how strong the Moon's gravity is and how hard he needs to jump.
** Additionally, Saitama takes a few seconds to travel from the moon to Earth. The fastest crossing of that distance we've ever managed was a nearly nine hour journey, where the probe involved never slowed down or entered lunar orbit, and Saitama manages it (by jumping!) in a miniscule fraction of that time. Exactly how hard did he launch himself?!
*** Light takes one second to cross the distance. Saitama crossed it in almost ''half that time.'' That means that Saitama is pretty much ''[[LudicrousSpeed faster than light.]]''
* The fact that Boros was [[spoiler: actually able to survive Saitama's "Normal Consecutive Punches" attack!]]
** ''How'' Boros [[spoiler: survived Saitama's "Normal Consecutive Punches". He was practically liquefied (save for a few pieces of flesh and organs) and from there, literally pulled himself back together for his final and strongest attack.]]
** One might simply leave it at that Boros was ''actually able to give Saitama something resembling a fight'' and that involves actually being able to land hits on Saitama (even though they did no damage) while Saitama was ''actually trying to dodge.'' To put that into perspective, up until now the only times Saitama has ever been hit by an attack was when he deliberately decided to take it, when he actually puts a little effort into dodging no opponent up to this point (which includes heavy hitters like Genos and Sonic) has been capable of touching him. Even if he didn't satisfy Saitama's need for excitement, he impressed him enough that Saitama actually stuck around to speak with him in his last moments, whereas Saitama usually just forgets his opponent existed as soon as they're down. [[spoiler: Considering it now appears Saitama possesses ''literally'' infinite power,]] to genuinely earn his respect in ''battle?'' Astounding.
*** Also keep in mind that Boros spent the first half of the above fight with [[spoiler: only one arm after Saitama punched it off]], an injury he completely ignored until he decided to grow it back instantly through sheer force of will!
* How Saitama defeated [[AlienInvasion Boros]]: [[spoiler: He punched back his [[LimitBreak Planet Buster Roar Cannon]] that can destroy Earth's surface and not only did he utterly [[OneHitKill annihilate]] Boros, he also ended up destroying his massive ship and clearing a large part of the atmosphere from the clouds by ''[[http://www.mangareader.net/onepunch-man/48/32 creating a massive gap in the sky that stretches through the circumference of the planet]]'', reminiscent to how [[TheBible Moses parted the Red Sea]], all through the sheer shockwave he released through that one punch.]]
** [[spoiler: Check out the bottom left corner of that image. See those two split 'contrails'? ''That'' was the shockwave from Boros' full-powered, earth-annihilating attack. It looks pathetic compared to Saitama's heaven splitter (which was delivered at a fraction of his full power).]]
** Not only that, but Boros' [[LastWords dying words]] [[spoiler: implied that Saitama ''was still holding back during their fight''. He ''split the sky'' with a punch, and that was ''still'' not his full power.]] [[StoryBreakerPower Way too strong indeed]]...
* Episode 12 forgoes the anime's opening in favor of [[ThemeSongPowerUp playing the theme over Saitama and Boros having an amazingly animated fight]], increasing the awesomeness of both.
** Made even better when you listen closely: they use the second verse of the theme song, never heard in the show before now! Why is this awesome? Well, check the lyrical contents: "With my godlike fist I will fight on, until I know the taste of defeat one day". The song's perspective now applies to ''both Saitama and Boros'', which is ''perfect'' when you remember they share the same internalized struggle.
** Speaking of the music, when the main theme starts playing at the end of the battle, [[spoiler: after Saitama returns from the Moon]], notice where the music swells. [[spoiler: It's when Boros goes all out. Saitama was never at risk, his victory was a ForegoneConclusion, but Boros was giving everything he's got in that fight, the unstoppable force who finally met his immovable object. The main theme was playing for him at the end.]]
* While it pales in comparison to the fight between Saitama and Boros, the ending scene of the anime has one awesome BookEnds moment. When the Dragon-level threat Pluton tries to murder a child, Genos comes to the rescue and even uses a version of Saitama's catchphrase. Then Saitama comes shooting through the air towards Pluton and, once again, takes out the monster with one punch. Pluton's whole body, which is Kaiju-sized, can be seen exploding into blood and guts after the attack, while Saitama laments that he's back to killing monsters with just one punch.

[[folder: King Arc]]
* Genos defeating G4 by himself. Considering it was there to kill King (under the impression that he was actually the strongest hero everyone believes he is), it's quite a feat, and it shows just how deserving Genos really is of his rank in Class S. He still [[RunningGag lost his arm]] and half of his face, [[IronButtMonkey which is to be expected]], but in this case it makes him look even more badass.

!Human Monster Saga
[[folder: Garou Introduction Arc]]
* At a meeting with nearly every single villain in the city, and three A class heroes, [[spoiler: Garou defeats every single one of them with extreme ease. He even breaks the arm of a A ranked hero twice his size and knocks him out with one punch. This guy is the monster version of Saitama, but with lots of hair!]]

[[folder: The Blizzard Group Arc]]
* In Murata's remake, which usually has additional events and scenes that aren't present in One's original, after Blizzard attacks Saitama when Genos fights Sonic and causes a huge explosion, Saitama shields Fubuki from the explosion. This is very clear by the fact that Sonic and Genos were BEHIND her when they caused the explosion but in the next scene, Saitama was in front of Fubuki. Even more awesome? There was a blast shadow where everything behind Saitama not shielded by his body was FLATTENED. He may be lazy but Saitama is still a hero.
* Another great speech made by Saitama was when he was confronted by Fubuki A.K.A Blizzard of Hell. [[spoiler: Fubuki attacks Saitama because she feels threatened by how fast he has gone up in the hero association's ranks. When she tries to force him into working under her his response is "You won't survive. You just don't get what being a hero is about. There are all kinds of powerful bad guys in the world. Heroes are the ones who oppose them, even if they are alone. If you just gather people who are weaker than you, you won't last. You'll end up crying when a monster appears that's stronger than you. Your subordinates won't be able to save you. Factions? Newbie crushing? Holding your rank? That has nothing to do with anything! Don't look down on heroes you moron!"]]
* Speed of Sound Sonic eventually reveals one of his more powerful abilities: [[spoiler: [[SpeedEchoes Speed Clones]]. In particular he is capable of making ten clones at a given time, which Genos considered impossible for a human to do and was revered by Sonic to be the only technique capable of killing Saitama. Then Saitama busts one of the moves from his [[LetsGetDangerous "Serious Series"]]... '' '''[[UpToEleven and reveals that he can create]] [[AlwaysSomeoneBetter hundreds of speed clones]]''' ''.]]
** Saitama used his Serious Series against Sonic. Up to that point, he'd only used them against [[spoiler: Boros' planet-destroyer final move.]] That's a huge achievement for the ninja (althought it [[CurbStompBattle doesn't help him much]]).

%%[[folder: Hero Hunt Arc]]


[[folder: Monster Raid Arc]]
* Metal Bat proving why he's an S-Class Hero by taking down Human Bird, Rafflesidon, and Junior & Senior Centipede, who are both Demon-level threats, by himself.
* Metal Bat managing to get several hits on Elder Centipede's face, a Dragon-level threat. He even managed to get back up after Elder Centipede threw him a great distance. Unfortunately, he landed near [[spoiler: Garou]].
** And that's not all: as shown in [[spoiler: his fight against Garou]], he gets gradually stronger while fighting, meaning he could have unleashed even stronger blows against the centipede. Also, [[spoiler: even though it doesn't succeed, his ultimate technique against Garou manages to hit him so hard Garou's left with his bones shaking, despite having deflected every single one of his blows. The hero hunter himself acknowledges that a direct hit would have been troublesome.]]
** The next chapter just ups the ante of Metal Bat's badassery. [[spoiler: Just as Garou thinks he's won, it jump cuts to Metal Bat about to ''smash his skull in with his bat''. He's forced to stop himself when his little sister shows up because [[HonorBeforeReason he promised not to be violent in front of her]] but it was still strong enough to leave a ''crater on the ground without hitting Garou''.]]
* Proof that anybody can be awesome: [[spoiler:Metal Bat's little sister does a GoThroughMe on Garou, having no way to protect her badly-beaten brother except by putting herself in the way. Apparently the badassitude is genetic.]]

[[folder: Monster Association Arc]]
* When Lightspeed Flash mistakes Saitama for a monster, [[spoiler: his first response is to use his Lightspeed Slash attack. Saitama dodges it like it was nothing. He tries the same attack again just to make sure it wasn't a fluke and Saitama performs a BareHandedBladeBlock ''with one hand''. And once again, neither of these really push him to his limit; he doesn't even use his serious series moves or anything. Saitama just casually dodges and blocks ''[[FasterThanLightTravel faster than the speed of light]]''.]]
%%* Saitama vs [[spoiler: Garou. FULL STOP.]]

[[folder:Psychic Sisters Arc]]
* [[spoiler: Fubuki fighting her sister Tatsumaki. What makes this awesome is that it shows Fubuki's growth. From cowering from her sister to trying to fight her as an equal. She lost but the thought still counts]]
** [[spoiler: Her group coming to her aid and showing off their own super forms to team up against Tatsumaki is equally commendable, as is Saitama rising from the ground pissed off.]]
%%* And now [[spoiler:[[CoolVsAwesome Saitama vs. Tatsumaki]]]]
* 18 years ago, Tatsumaki was kidnapped by a group of scientists and experimented on. When she stopped being able to use her telekinesis, they decided to lock her in a cell and said they would only let her out when she began performing again. Before this could happen, one of their monsters got loose and began rampaging through the base, bearing down on the helpless Tornado. Suddenly, a mysterious figure kills the monster.
--> Tatusmaki: "Who are you?"
--> [[spoiler: Blast: "I'm Blast. I work as a hero."]]

[[folder: Bonus Chapters]]
* For a manga that deconstructs shounen tropes, it still managed to play one straight: namely, Saitama telling a Class-B Hero to [[{{Determinator}} never give up on working hard to advance beyond their limits.]] [[spoiler: This is after Saitama kills a [[OurDemonsAreDifferent giant propeller fan]] with one punch that a previous S-class hero (ranked 2nd) didn't completely destroy after it wiped out the B-rank hero's similarly ranked comrades.]]
* King has one feat under his belt that shows he's worthy of his name: he beat 30 members of the Blizzard Group sigle-handed in a video game competition.

[[folder: Unsorted]]
* SugarWiki/AwesomeArt: Not just the realism and detail of Murata's illustrations, but the sheer SCALE of them!
* How Madhouse handled the job of animating the story for Fall 2015. Just the already-[[http://youtu.be/90Ita6-vmy4 Godlike OP]] (extra bonus for having Music/JAMProject do the honors) is enough proof that [[AwesomeArt they definitely pulled out all the stops.]]
* SugarWiki/AwesomeMusic: [[https://www.youtube.com/watch?v=HcpVSbmphSQ The opening.]] Made more awesome since it's by [[Music/JamProject JAM Project]]. The entire anime soundtrack in general.
* SugarWiki/VisualEffectsOfAwesome: The anime, particularly in the fight scenes, is praised for being downright '''gorgeous''' to look at, with many seeing it equalling (and in some instances, to some people, surpassing) Creator/{{Ufotable}} levels of quality. Making it all the more impressive, however, is that it's being done on the usual budget for an anime - it's all, aside from having some of the best animators in the industry working on the anime, the passion for the original work that these animators have for it, working their best on an average budget.
* Meta: The utterly absurd odds that this series had to overcome to get to where it is today. It started out as a poorly-drawn webcomic. Despite the poor art, it got incredibly popular, eventually gaining the attention of Yusuke Murata, the illustrator for Manga/Eyeshield21. Murata offered to redraw One Punch Man for digital publication by Weekly Young Jump. From there, it continued to grow in popularity, gaining an international release, and finally, the lovingly animated masterpiece that we all know.
* Meta: FandomRivalry with Franchise/DragonBall and Franchise/{{Superman}} fandoms over who is stronger. These two fandoms are well-known for their stern refusal to accept their respective favorite is not the strongest hero ever, it's the reason why they've been at each other's throats for years. However, they are also pretty dismissive of most characters from other franchises with comparable showings, only really focusing on each other as a rival. The fact that Saitama's been accepted as serious contender in their UltimateShowdownOfUltimateDestiny speaks volumes about how impressive his exploits have been.