Tom and Jerry/Awesome

• Whenever Tom and Jerry team up against a greater foe typically qualifies as a CMoA, because when they do, said foe is in for a vicious and humiliating defeat; there are several sterling examples of why it's never a good idea to piss both Tom and Jerry off.
  • In 1942's Dog Trouble, an Ax Crazy Spike alternates between terrorising Tom and Jerry until they end up in the same safe haven atop a cuckoo clock. Jerry spots a basket of knitting yarn, and while Tom distracts Spike with his tail, he winds the yarn around every piece of furniture and breakable item in the living room. After doing so, he provokes Spike into running headlong into the tangled web, demolishing every last thing in said room. After seeing the resulting sight to behold, an irate Mammy Two-Shoes throws an indignant Spike back onto the porch.
  • In 1952's Triplet Trouble, after the eponymous feline hellions have wrought havoc on both of them (while presenting angelic exteriors to Mammy Two-Shoes), Tom and Jerry exact revenge in style. Jerry first provokes the kittens by drinking their purloined cream and squirting it back in their faces, then leads them straight to Tom, perched on a hostess trolley... on which he takes to the air like a bomber pilot, hurling pies and watermelons at the kittens before scooping them up and dropping them onto a spinning clothesline. Jerry spanks each kitten with a carpet beater while Tom ties little paper wings to their backs, so that when Mammy returns from the store with a bottle of cream, she finds the "little angels" still spinning on the clothesline, each sporting a bright red backside.
    • The set-up is great too, as each has gotten laughs out of seeing the other being tormented by the trio until they're on the receiving end. It comes to a terrific shot of the two thrown out a window, glaring inside and then sharing a look. You can see them both thinking "I don't like you, you don't like me, but we both hate those punks even more, so..."
  • This seems to happen a lot in the made-for-video movies, but the greatest example is Tom and Jerry Meet the Wizard of Oz. Early in the film, Miss Gulch takes Toto away from Dorothy, and Tom and Jerry decide that they won't allow this to happen... so they fix up a makeshift bike, go after Miss Gulch and manage to save Toto.
    • Then, as the film progresses, the two try to protect Dorothy from the Wicked Witch of the West and manage to get the very bucket of water that melts her.
  • It doesn't just have to be when they team up to defeat an enemy either. Any time they team up counts as a CMoA or a CMoH. There's one episode I know of in particular where Tom and Jerry work together to bring a baby safely home (because the Dumb Blonde babysitter is too busy chatting on the phone).
• It can also be particularly gratifying when Tom wins on occasion. When he does win, it tends to be because he really deserved to.
  • In 1944's The Million Dollar Cat, Tom inherits a vast amount of money, but the inheritance comes with a clause that he will lose all the money if he ever harms a single animal, "even a mouse". Jerry decides to be a complete prick about this: stealing Tom's money, eating the extravagant food right off of Tom's plate and even causing grievous bodily harm to the poor housecat, all because he knows Tom can't retaliate. Eventually, Tom snaps and, after tearing up the contract and stuffing it into Jerry's mouth, proceeds to beat the crap out of the little rodent, because there are some things more important than money... like the happiness you gain from taking revenge on the little bastard that made your life miserable.

Tom: "Gee, I'm throwin' away a million dollars... BUT I'M HAPPY!" (proceeds to deliver the mother of all No-Holds-Barred Beatdowns to Jerry)

• • In the 1953 short Mouse for Sale, after Jerry charms Tom's owner, Joan, as "Jerry the Dancing Mouse", despite Tom's repeated attempts to prove that Jerry is not the rare white mouse Joan believes, Tom turns the tables on Jerry by painting himself white and winning Joan over as "Tom the Dancing Cat", ending the cartoon with a performance that involves repeatedly kicking Jerry in the rear.
  • In Timid Tabby from 1957, Tom and his cousin George get revenge on Jerry for tormenting the intensely mouse-phobic George by teaming up and Gaslighting him into thinking he's gone insane, sending him running to a mental institution for mice (and as an added bonus, George's fear of mice is cured).
  • In 1958's The Vanishing Duck, Jerry and Quacker use vanishing cream to literally turn themselves invisible and mess around with Tom. Tom discovers the cream himself and decides to employ some Laser-Guided Karma.
  • From 1965, The Year of the Mouse. If you make a poor cat believe that he's trying to kill himself while sleeping, then ending up trapped in a bottle, with its cap tied to a gun's trigger, is pretty much what you deserve.
  • The Chuck Jones-era Love Me, Love My Mouse from 1966, in which, after Tom has to deal consistently with getting framed for mischief after Jerry pretends to be helpless in front of Toots, Toots's feline instincts awaken upon kissing Jerry tenderly, much to the latter's horror. Even Tom, despite being covered in bandages and plasters, gets the strength to join Toots as they chase Jerry into the sunset wielding knives and forks.
    • Bonus points for the subversion of how, in some particular shorts from Hanna-Barbera-era, Jerry gets to usually kiss or woo the main girl Tom (along his rivals) was going after, without such logic applied.
• The canary saving Jerry from being run over by Tom in Kitty Foiled.
• In Professor Tom, when Tom starts spanking his student for letting Jerry get away, Jerry responds to this by breaking Tom's tailbone.
• In The Milky Waif, Jerry going Papa Wolf on Tom after Tom spanks Nibbles with a flyswatter.
• Muscles Mouse from Jerry's Cousin is practically this trope incarnate:
  • The mere sight of Muscles Mouse causes a gang of alley cats to run for the hills, with Butch being so terrified that he digs a grave in the middle of the sidewalk and buries himself.
  • Muscles picking up a lit firecracker and throwing it into Tom's mouth.
  • Tom does some weight training, and eventually decides that it's a good idea to punch Muscles in the face. Muscles promptly inflates his own hand and sends Tom flying into a cuckoo clock with a Megaton Punch.
  • Tom then tries to crush Muscles with a bowling ball. It doesn't work.
  • Eventually, Tom resorts to hiring a gang of thugs to take out Muscles. Muscles proceeds to take each and every single one of them out without breaking a sweat.