Awesome / One-Punch Man

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

     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.

Hero Association Saga

     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 after image.
    • How does the spar session end? Adhering to the rules not to hold back, Saitama prepares to 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 Anime 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.

     Giant Meteor Arc 

     Sea Monster Arc 
  • The very beginning - a giant cthulhoid monstrosity strides on shore declaring the superiority of all undersea creatures, while Saitama just happens to be randomly walking by. Said giant octopus-monster notices Saitama and loudly declares that he will be destroyed. You all know what 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 Until the Deep Sea King shows up and easily takes ''Stinger'' down.
  • Puri-Puri 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 Lightning Bruiser monster with a severe Healing Factor. While naked.
  • Licenseless Rider versus the Sea King, an unpowered C-class hero against an unstoppable monster, knowing he has no chance, 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.
  • Saitama's fight against the Sea King. 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 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 One-Winged Angel form without his weapons.
    • Genos punched him through a wall and fought him blow for blow 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!

     Alien Conquerors Arc 
  • From the anime: Tatsumaki's fighting a giant Godzilla-esque lizard. The monster boasts that if she wants to kill him she'd need to drop a large meteor on him. Tatsumaki does exactly that, and only a molten skeleton is left afterwards.
  • 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 faster than light.
  • The fact that Boros was actually able to survive Saitama's "Normal Consecutive Punches" attack!
    • How Boros 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. Considering it now appears Saitama possesses literally infinite power, to genuinely earn his respect in battle? Astounding.
  • How Saitama defeated Boros: He punched back his Planet Buster Roar Cannon that can destroy Earth's surface and not only did he utterly annihilate Boros, he also ended up destroying his massive ship and clearing a large part of the atmosphere from the clouds by creating a massive gap in the sky that stretches through the circumference of the planet, reminiscent to how Moses parted the Red Sea, all through the sheer shockwave he released through that one punch.
    • 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' dying words 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. Way too strong indeed...
  • Episode 12 forgoes the anime's opening in favor of 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, after Saitama returns from the Moon, notice where the music swells. It's when Boros goes all out. Saitama was never at risk, his victory was a Foregone Conclusion, 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.

     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 lost his arm and half of his face, which is to be expected, but in this case it makes him look even more badass.

Human Monster Saga

     Garou Introduction Arc 
  • At a meeting with nearly every single villain in the city, and three A class heroes, 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!

     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. 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: 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 "Serious Series"... and reveals that he can create hundreds of speed clones .
    • Saitama used his Serious Series against Sonic. Up to that point, he'd only used them against Boros' planet-destroyer final move. That's a huge achievement for the ninja (althought it doesn't help him much).

     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 Garou.
    • And that's not all: as shown in his fight against Garou, he gets gradually stronger while fighting, meaning he could have unleashed even stronger blows against the centipede. Also, 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. 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 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: Metal Bat's little sister does a Go Through Me on Garou, having no way to protect her badly-beaten brother except by putting herself in the way. Apparently the badassitude is genetic.

     Monster Association Arc 
  • When Lightspeed Flash mistakes Saitama for a monster, 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 Bare-Handed Blade Block 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 faster than the speed of light.

    Psychic Sisters Arc 
  • 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
    • 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.


     Bonus Chapters 

  • Awesome Art: 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-Godlike OP (extra bonus for having JAM Project do the honors) is enough proof that they definitely pulled out all the stops.
  • Awesome Music: The opening. Made more awesome since it's by JAM Project. The entire anime soundtrack in general.
  • Visual Effects of Awesome: 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) 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 Eyeshield 21. 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.