Moment pages never use spoiler tagging — so beware of unmarked spoilers
Cyclops gets a good one in "Night of the Sentinels" where he straight up decapitates a Sentinel with his eye blast.
Gambit gets one when Morph is imitating Professor X. After Morph says something that doesn't sound like something the Professor would say, he flips a playing card on his desk, causing Morph to use his legs to crawl away in fear... and the card wasn't charged at all. Win.
Gambit throws down a charged card into a tunnel of Sentinels. One of the Sentinels asks what it is. The other kneels down and says "It appears to be the ace of spades." Then the card blows up, taking off the Sentinel's head.
In the fight scene preceding the above, Wolverine solos a Sentinel horde in the pitch-black tunnel, the battle sparsely illuminated by the latter's energy blasts.
Finally, just when it all seems to be over, Master Mold bursts from the top of the mountain, fully intact. By this point, Professor Xavier has had more than ''enough'' of this thing, and he shows it by ramming it with the Blackbird (which he has filled with explosives for just such an occasion) while charging it with being the embodiment of all that is evil in mankind.
Magneto, for clinging to the Blackbird and protecting it with his forcefield against Master Mold's blasts.
Still not complete without the accompanying quote!
Master Mold:MUTANTS! I CANNOT BE DESTROYED! Prof. X: You are the living embodiment of all that is evil and unjust in humankind. Youmustbe destroyed!
Master Mold himself gets one in his debut episode, after his true nature is revealed, Trask, his maker, is utterly shocked. Master Mold calmly points out how full of crap Trask is the way only a machine can.
At the end of the two-parter "Sanctuary," Magneto goes on a Roaring Rampage of Revenge against his own asteroid base... all to get revenge on his betrayer, Fabian Cortez. After spending most of the arc weakened from his efforts, he shuts down hundreds of nuclear warheads and drags an asteroid through Earth's atmosphere, while bidding a fond farewell to Charles Xavier.
Seeing Magneto's return and his declaration that he was coming for Cortez's ass will trigger a massive Oh, Crap! even if you're rooting for him.
In "Repo Man", Heather Hudson manages to tranquilise a berserk Wolverine, who was going to kill her husband, and to talk him out his rage when he wakes up in their cabin. To face a dangerous mutant that's acting like a cornered wild animal and about to kill you to escape, then calming him down with words, shows how much courage and compassion Heather had.
A CMOA that lasted an entire season ensued during the show's second season, where Professor Xavier and Magneto were depowered and stuck in the Savage Land, though Xavier was given the ability to walk normally as a side effect. Using only their considerable intellect and willpower, they manage to outwit the most hostile place in the X-Men universe (not counting Bishop's Bad Future), even though they are captured by the Big Bad at the end...
Which leads to one of the most impressive Battles Royale in the entire series, when Xavier, Magneto, and the entire team of X-Men battle Sinister and the Savage Land Mutates during the season finale.
Beast living up to his name in "Beauty & the Beast," in which he unleashes a brutal beating on the Friends Of Humanity for kidnapping the woman he loves. Wolverine gets one in this episode, too, for using his intelligence instead of his berserker attitude to bring down the organization.
Wolverine confronting Sabretooth in "Deadly Reunions":
"All right, you egg-suckin' piece of gutter trash, you always liked pushin' around people smaller than you. Well, I'm smaller! Try pushin' me! ... You always were second best. And in this business, second best don't cut it!"
Cyclops laying a massive beatdown on Mister Sinister in the season 2 opener.
Cable makes his first appearance when some of the X-Men are placed in a slave labor camp. He holds Gambit at gunpoint after an escape attempt, takes out his guards, then sets Gambit to rescue the others while he goes on a one-mutant assault on the leader. It ends with Cable finishing off the camp with naught but a big gun, getting in an Evil Laugh as a flood destroys the Sentinel production facility.
He appears in the next episode, hunting down Dr. Atler because of his (really Mystique's and Apocalypse's) so-called cure. He fights Archangel, takes out Pyro after dodging a flamethrower, and fights the X Men to a standstill.
Cry of the Banshee: Juggernaut owns Erik the Red.
Juggernaut later gets owned by Gladiator, who no sells the former's punch, and casually tosses him aside.
Jubilee: Wow! I didn't think anyone could do that to Juggernaut.
Gambit: Nobody from Earth.
In the Finale of Beyond Good and Evil against Apocalypse, Bishop is trying to disrupt his plans by freeing the captured psychics and Apocalypse goes to deal with him. Sinister and his goons watch on.
Mr. Sinister: (Snidely) One man, small and alone, trying to defend the Universe.
SNIKT! Cue the Big Damn Heroes moment from Wolverine who's freed himself.
Wolverine: TWO small men, Sinister!!
Magneto gets his as well when he's had enough when he discovers what Apocalypse will do.
Apocalypse: You dare to betray your Master?!
Magneto: I call NO one master, especially one who would destroy the innocent along with the guilty!
The whole arc is one for Immortus. He manipulates Bishop so he'll be in the right place at the right time to help stop Apocalypse's plan, trolls his catspaw relentlessly, and gets what he wants with no one the wiser. There's a reason he was once called The Conqueror.
Cable's sass against Apocalypse.
Apocalypse: You have crossed a dozen life times to face me. When will you learn it cannot be done? Cable: Guess I'm just a slow learner.
During Part 2 of Night of The Sentinels when she gets knocked down by one, she flies back up and delivers a Hip Toss to the Sentinel, breaking it apart
Cable, in "Time Fugitives Part 2", once he figures the X-Men aren't to be underestimated, manages to formulate a plan to save them, thwart Apocalypse and still make sure everyone in both his and Bishop's futures survives.
