Jonathan Joestar, in the first series, is at first a wimpy punching bag for Dio, but draws upon hidden reserves of badass when his father is poisoned. When he is accosted by thugs in an alley, for example, he stops their knives with his bare hands, impressing one of them so much that he swears lifelong allegiance to JoJo rather than fight him.
Before that, there was the cathartic moment where he finally beat Dio so badly that Dio burst into tears.
And of course, let us not forget the time he manages to fight the newly vampirized Dio to a draw without his Ripple powers and while heavily injured and ON FIRE.
The very nature of the Ripple powers is itself a CMOA. Through special breathing techniques the characters change the flow of energy through their body to match the wavelength of sunlight. Then they use this power to punch vampires to death.
The first opening of the 2012 anime. It's basically telling you "Yeah, all this badassery? This is where it all began."
Lisa Lisa gets one when the first time she gets involved in the action, she simply pulls off her scarf and in an instant wraps it around the vampire she was fighting in an instant. she then releases the hamon which kills it. since vampires up to this point at been a real threat this was awesome and showed that the author wasn't lying when he said she was 3 times stronger than the Jojo of part 2.
Joseph Joestar does this anytime he predicts what the person he's fighting is going to say next. "Your next words are, Never, Jojo!"
Above all when completely turning the tables on the Empress in part 3. When he is sixty-bloody-nine. Gawd.
But his crowning moment was more like shooting the literally unkillable ultimate life form into the depths of space by reflecting his lasers into a volcano and causing a gigantic eruption. And while making a final kick to the pants by bluffing that it was all planned from the beginning just to piss him off.
Interestingly, at one point, Esidisi does this routine to Joseph himself. Not that it lasts horribly long...
Dio himself has his moments to shine, most notably in Part 3 where he decides that the most effective way to kill Jotaro would be to drop a steamroller on him. This moment was considered so awesome that it became an internet meme via a popular flash video.
The best part is, Jotaro survived. Also Jotaro's three page beat down of Steely Dan and Giorno's four page beatdown of Cioccolotta with a Wryyyyyy on top.
Giorno's beatdown is actually three pages of MUDAMUDAMUDAMUDA followed by a WRYYYYYYYYYYYYYY, then a two-page MUDAMUDAMUDA, another page of MUDAMUDAMUDA and a final panel of even more MUDAMUDAMUDA, making it seven pages and a panel total.
One of Dio's best moments is something that requires a little thought. Remember when Jotaro has Star Platinum carve a minaret in half and throw it an approaching Dio, then he explodes out of it to punch Dio a few times? What's cool isn't that Dio was able to chew away the building by punching it, without the assistance of The World, and not that he completely repels Jotaro's attack anyway, but that Jotaro was only able to get close enough because he occupied Dio's attention with the minaret. Dio is so tough that a building thrown at him is a distraction.
Also works for Jotaro because that also means that he and Star Platinum are more threatening than having a building thrown at you.
Jotaro Kujo has just way too many of these too list, but we'll try anyway:
He stops his own heart in order to trick Dio into coming close enough to hit him with Star Platinum.
Immediately prior to the above, after parrying about 20 or so thrown knives with his Stand, he gets hit by the rest (According to the OVA, seven knives, three in the chest, two in the stomach, one in the forearm, and one in each leg. Oh, and one in the forehead). He then reveals that he managed to survive by stuffing copies of Shonen Jump in his jacket. However, his arm and legs remain wounded, and the final knife in the forehead, despite sinking hilt-deep into his cranium through his hat, seems to have done no real damage.
The knife actually goes into his hat and possibly into his hair, somewhat running the joke that his hat and hair are seemingly fused together.
In the manga, it's shown that he stuffed a magazine in his hat as well. How the hell it fit there is anyone's guess, though.
His very first appearance has him in jail. Out of nowhere, a can of beer appears in his hands and he starts shotgunning it. In a jail cell, in full view of the guards. Later on, we get a second view of the cell, and he's surrounded by clothes, books, and tons of assorted crap that no one can figure out how he got, because he's still in the damn cell and hasn't moved an inch.
And everyone in the jail is terrified of him.
His defeat of Daniel J. D'Arby, where his poker face is so incredibly good that D'Arby freaks out and thinks that Jotaro has a great hand. Jotaro keeps betting higher and higher, putting up not only his own soul, but his mother's and his friend's, without ever looking at his cards. D'Arby eventually gets so stressed out that he snaps and admits defeat, freeing all the souls that he'd taken over the years. (And by snaps that means he goes COMPLETELY insane, falling to the ground babbling and drooling). Jotaro's allies check out Jotaro's hand, and it's revealed that he had BAD HAND - an eight, a six, a ten, an ace, and a jack, all offsuit. He'd won entirely through mind games. Go watch episode three of the 1993 OVA.
Even better is the fact D'Arby had set the scene ahead of time so that he would be playing with a deck stacked 100% in his favor no matter what. He set it up so Jotaro would get a bad hand and he would get a good hand no matter what, yet Jotaro STILL managed to completely bluff him into losing while he had 4 Kings.
It was less bluffing and more the fact that he was using his stand to practically gaslight D'Arby. Jotaro's real plan is to make him fold and makes him panic. Note that if he were to see his hand he'll be shock and worried.
Enya's stand, Justice is so invincible that she manage to beat Hol Horse and Polnareff. What does Jotaro do to beat her Stand? Inhale it and make Enya lose breath and faints.
When Steely Dan plants his Stand in Joseph's head and threatens to kill him, Jotaro has to put up with a massive amount of crap from Dan in order to stall for time while Polnareff and Kakyoin get it out. After every incident of abuse, Jotaro writes down exactly what Dan did so "he can remember what to think about when I kick his ass". When Polnareff and Kakyoin succeed, Dan tries to put his Stand in Jotaro's head by distracting him with an innocent bystander. Jotaro, however, has already got Dan's Stand with his own, and he proceeds to beat the crap out of Dan. For three whole pages. When he's done, Jotaro tosses the book he'd been writing in onto Dan's badly battered body and tells him: "Here's your bill."
Can we emphasize the point that we are talking about three whole pages of nothing but ORAORAORAORAORAORA and endless pain? Not one for half-measures, is Jotaro.
He also smiles while being humiliated "Why are you smiling?" "Because it's going to be all the more fun when I kick your ass later"
As a supporting character he survives getting blown up and while nearly knocked out from it is able to beat down the main bad guy of Part 4.
And in Part 6, he gets his head about half chopped off, only to shrug it off and return to thinking of ways to beat his opponent. So what if Diver Down took the brunt of the attack?
While fighting the stand without a master, Anubis, Jotaro gets stabbed in the gut, but manages to break Anubis' sword by using his own body as leverage. That's right: he intentionally gets almost mortally wounded to defeat an enemy who is literally an evil sword that possesses people.
To prove that he really is badass personified, Jotaro beats up Alessi with his own fists after Alessi's stand Sethan turns him into a kid.
Noriaki Kakyoin gets three of them:
While battling the Hanged Man, a Stand that attacks by leaping from reflective surface to reflective surface (including people's corneas), Kakyoin and Polnareff figure out how to attack him and trap him in one surface. In response, the Hanged Man's user yells that they're handing out free money, drawing every beggar in India to them (and giving him a bevy of places to hide). Kakyoin's response: he throws a coin in the air, causing everyone to look at it and trapping the Hanged Man with one destination.
Then there's how he punishes Death 13. It's just a baby, and nobody else remembers what it did, so he can't hurt him... but he makes him suffer nonetheless. How does he do it? By spoon-feeding the baby his own shit!
After encountering Dio, Kakyoin manages to entangle a plethora of buildings in his Stand. He specifies that it will detect anything that Dio or the World happen to do when they come in contact with it. Dio bypasses it completely, by using his Stand's Time Stop power, and is able to impale Kakyoin with the World's arm. Despite living his last moments, Kakyoin manages to keep calm, analyze the ability that the World possesses, and even pass on his conclusion to the rest of the group by blasting a clock tower with his Emerald Splash.
Polnareff and Avdol share a CMOA when they battle the Stand Judgement; they find the air tube the stand user's breathing out of while he's hiding underground and collectively...urinate into it in order to draw him out; Avdol then proceeds to burn the Stand user's clothes right off, leaving him nearly naked and with a bad hair job.
Polnareff has a better one: his whole fight with Vanilla Ice, particularly the ending, when he figures out Vanilla Ice had only survived being stabbed in the head because Dio had turned him into a vampire, and then forces him into the sunlight.
Josuke Higashikata has a couple as well:
He beats the daylights out of the serial killer Angelo and fuses him into a rock and puts a sign up saying "put your dog doo here".
To initially trap him, he lets Angelo's stand go down his throat, but he swallowed a plastic glove that he tied of in his throat to catch the stand.
Then he outfoxes a electricity welding thief by putting his Stand in a rubber tire. When Red Hot Chili Pepper (the Stand) busts out, he flies into the ocean and gets owned bad.
He turns Terunosuke Miyamoto (uses the Stand Enigma) into a book after returning to normal after having been folded into paper.
His blind rage makes Rohan's Heaven's Gate completely useless.
When fighting Man on the Tower, he starts to fall and he can't grab onto anything. He then has to punch the tower so the tower will punch him back with the same power and launch him upwards.
Has the best hairstyle ever (If you are a big enough fan, this counts).
Barring Giorno, whose hair might be the source of his powers. No one knows.
He cheated at the lottery and actually got to keep the money (until his mom found out he won and took it all) so he gambled with a guy that could read people very well, cheated at that and won. He IS his father's son after all.
Some can argue that this is the gambling equivalent to part 3.
He (with Koichi's help) Drove around a city over the speed of 60 mphs to escape energy draining feet. Then went to the hospital, found the guy controlling the feet, healed the guy's motocycle accident injuries, then beat him up again and sent him flying through the third story window into a fountain.
On top of that, when he was coming out of the sewers he was running out of gas, so he hit a wall, flew over it, had Crazy Diamond break a car in front of him open, go over the car, have the Highway Star run into the car, repair the car so Highway Star is trapped, and siphon the gas.
Then the same guy saved his life from a guy who could fold anything into paper.
The first time he runs into Yoshikage, he just got to him from repairing Josuke and Koichi. Now Yoshikage trips up when he wants Josuke to heal him, so he cuts off his right hand to let sheer heart attack stay there as long as needed, but Josuke counters this by repairing the hand so sheer heart attack leaves and that way he can follow the flying hand to find Yoshikage.
Actually, Rohan gets a few himself.
Just as a normal thing he does, he can write into you the command, "can't attack Rohan Kishibe" and it does just that.
When fighting Boys 2 Men, he loses 2 thirds of his stand through rock paper scissors, but in order to stop the total loss of Heaven's Gate he uses Shizuka Joestar (the baby that can make itself invisible) to force Ken to make the losing hand. He gets called out for this cheat, so he accepts to start over and wins three times in a row, fair and square.
Similar to White Snake, he can make you do impossible feats by writing them into your head.
He forced Josuke to fly backwards at 70kph just by writing it.
Hayato, probably the last example of a Badass Normal in the series, managing to stop Kira's Bite The Dust bomb, inflicting some heavy damage on him in the process using a plant-cat.
His entire final battle against Josuke, where he teamed up with the aforementioned plant-cat in order to create explosive homing air bombs that were being guided by the photograph containing the spirit of Yoshihiro Kira.
Giorno Giovanna did stuff too.
Mista: The helicopter is too far away, I can't hit it!
Giorno: How do you know you can't do something until you try.
(Then the two, working together, catch the helicopter by turning Mista's bullets into branches that spear the copter in midair.)
Don't forget when in this same fight, even after he had his opponent more or less dead by injecting Gold Experience's power into him, he proceeds to repeatedly beat him with his stand for 4 pages straight, ending it with an almighty cry of WRYYYYYYYYYYYYYYYYYYYY
Technically, Giorno's finisher of Cioccolatta lasted seven pages overall. That was three pages of "MUDAMUDAMUDAMUDAMUDA", one page of "WRYYYYYYYYY" another two pages of "MUDAMUDAMUDA", and completed by smashing him into a combustable trash vehicle. I counted exactly 76 repetitions of "MUDA" overall. Effing awesome!
He had one very early that proved just how kickass he is when he met Polpo again after a battle with his stand.
Giorno: I turned your gun into a banana. Treat it as your last meal.
Let us not forget how he defeated Illuso: He infected himself with a flesh-eating virus from Fugo's stand, allowed himself to be dragged into the mirror world just to infect Illuso with the virus, then cured himself of it by turning the virus shell casing into an immune snake then transfusing its blood into himself.
And then there's Bruno Bucciarati, and his zipper-making Stand, and that monumentally unnerving scene when he zips his own head open, effectively splitting it in half, to dodge an enemy's hit. And then zips it right back up, of course. For creative Stand use, there's really no competition.
But doesn't he trump himself at another point when he unzips his body into many, many pieces, stopping his blood circulation in order to trick a Stand user that can sense his heartbeat into thinking he suddenly escaped? Even Bucciarati eventually became convinced that he was going to die anyway when he had to keep it up for so long.
A small mention for Narancia in his fight against Formaggio. Escapes from a shrunken state by blowing up a nearby car. So when Formaggio shrinks himself to try and escape, what does Narancia do? Blow up every damned car on the street to turn the whole place into an inferno.
No mentions for Jolyne yet? During her fight against Versacci's "Underworld", which can recreate events from memories, she and Hermes are trapped on a plane that will crash. Their only way of surviving is to take two seats whose occupants miraculously survived, so they shove the occupants aside... and Versacci promptly drops three children from the hospital into the memory. He's convinced he's won; even if Jolyne would let them get killed to save herself and Hermes, the guilt would cripple her. The solution? She gives the seats to two of the children, has Hermes use Kiss to split one of the two surviving occupants (since they're destined to survive anyway), stick the third kid in between, and reseal the survivor, so the kid will live too. Finally, Hermes hides herself the same way in the second survivor, and Jolyne unwinds most of herself into string and shoves it down Hermes' throat. The lengths these people go to accomplish their goals astound me.
The stand C-Moon demonstrates its power to turn things inside-out by punching Jolyne in the legs, crippling her... until she kicks C-Moon in the fists to reverse the process. When C-Moon starts aiming for her heart and chest, Jolyne weaves her body into a Mobius strip that can't be inverted.
Both those Jolyne moments pale in comparison to the time she set her whole body on fire to make her enemy's attack stop working!!
She forms a bridge out of herself that allows her to walk on water.
This saves her because whe ended up using so much string that her enemy punches through her instead of into her.
Ending of part 6: After Pucci's started over a new world, wimpy kid Emporio's his last threat. But since everything except Pucci's actions are predestined, he can't change his actions, and will hide in the ghost room. When Pucci tries to strike him, though, he holds up the disc with the Weather Report stand, and Pucci effectively pushes the disc into his head. Emporio promptly gets serious the likes of which only Joestars can dream of, and beats Pucci into a bloody pulp, before finally killing him off with an ability that Pucci didn't even know Weather Report possessed.
This is the kid whose Stand is ONLY rooms with things in it that cannot affect/be affected by anything else other than Stand Users. He also, while running from a sped-up Pucci, used a ghost gun from one of the rooms and fired the bullets, teaming with Hermes's Stand Kiss to merge the bullet with its copy, just barely outmaneuvering Pucci. Kid is basically a Badass Normal, with the weakest Stand ever (Survivor is SOOO not the weakest Stand).
FYI, said ability that killed Pucci was Emporio using Weather Report to raise the level of Oxygen in the atmosphere to 100%, as he coldly describes to Pucci exactly how nasty his death is going to be.
Emporio: If you breath too much of it, first your hands and feet will go numb and then you will be unable to stand! The capillary veins in your eyes break as you go blind!
Trish from part 5 defeats a so called "invincible stand that had defeated everyone else so far by DESTROYING THE GOD DAMN PLANE THEY WERE RIDING. it was the first time she had used her stand.
Lucy Steel of Steel Ball Run is frequently considered nothing more than a young, pretty piece of arm-candy for her industrialist husband. What she actually is, is a DeterminatorGuile Hero who makes up for what she lacks in combat prowess with her intelligence, perceptiveness, and willingness to do anything... ANYTHING to protect the people she cares about. It comes to a head when she defeats the second Diego Brando in his moment of triumph by showing up with the severed head of the original Diego, using the setting's rule of Never The Selves Shall Meet to kill him.
After countless trials and the death of Gyro, Johnny finally learns how to spin the steel ball, which results in his stand evolving. The evolved stand proceeds to open Love Train with it's bare hands, and beat the shit out of Valentine.