"What's Opera, Doc?" — yes, with a question mark — is a 1957 Looney Tunes short famously described by director Chuck Jones as "our attempt to squish the entire Ring Cycle down to six minutes."^note In The Bugs Bunny/Road Runner Movie, Bugs says "seven minutes". Its runtime according to that other wiki is 6 minutes, 53 seconds. The incredible part is that they succeeded.

Specifically, the short is an ambitious parody of the operas of Richard Wagner, particularly Der Ring des Nibelungen (especially Die Walküre), and (musically) Der fliegende Holländer and Tannhäuser. It was written by Michael Maltese, who had warmed up for the task 12 years earlier with Friz Freleng's similar Herr Meets Hare, a war cartoon with Bugs pitted in a forest setting against Hermann Göring (!).

The plot follows Siegfried Fudd as he attempts to (what else?) kill innocent Bugs Bunny with his "speaw and magic hewlmet." Along the way, Fudd manages to fall in love with Brünnhilde, whom he doesn't realize is Bugs in drag; when he discovers he's been had, his tewwib — er, terrible wrath unleashes the full force of the helmet's awesome might: "Nowth winds bwow! South winds bwow! Typhoons! Huwwicanes! Eawthquakes! SMOOOOOOGGGGG!!"

As the tempest dies down, it reveals the broken form of the "poor wittle wabbit", whom he has, by all appearances, finally killed. Overcome with remorse, Fudd tenderly scoops up the body and marches sniffling into the sunset... at which point Bugs, very much alive, raises his head and inquires briskly of the audience: "Well, what did ya expect in an opera — a happy ending?"

Naturally, as this is an opera, almost all of the dialogue is sung ("O mighty warrior of great fighting stock, / Might I inquire to ask, 'Ehh, what's up Doc?'" to the tune of Siegfried's Horn Call). Most famous is Elmer's continual refrain of "Kill da wabbit!" to the tune of the "Ride of the Valkyries". The brief ballet sequence between Siegfried and "Brünnhilde" was painstakingly choreographed by animators who studied film of actual dancers. There's even a duet, "Return, My Love", with original words by Maltese, to the tune of the "Pilgrims' Chorus" from Tannhäuser.

Having taken roughly six times as much time and money to produce as most contemporary Looney Tunes shorts^note Chuck Jones wrote that, since Wile E. Coyote shorts were faster and cheaper to make, the animators were able to complete all of them within the studio's time and budget constraints, "What's Opera, Doc?" is considered by many to be Jones' magnum opus, and is one of the most beloved and critically acclaimed animated shorts of all time, if not the most. It has topped numerous lists compiled by film critics and professional animators, most notably in The 50 Greatest Cartoons and is also one of The 100 Greatest Looney Tunes Cartoons.

What's Opera, Doc? got selected for preservation in the National Film Registry.

"What's Opera, Doc?" provides examples of:

• Affectionate Parody: Of everything Wagnerian and Romantic in general. It is also a self-parody of the by-then tired Bugs-and-Elmer typical plot.
• Alas, Poor Villain: It's hard to not feel sad for poor Elmer as he grieves the fallen Bugs Bunny.
• Amusing Injuries: This most-favored-trope of the Looney Tunes is surprisingly averted at the end... in which it turns out that its being purely Played for Drama is the gag.
• Antagonist in Mourning: "What have I done? I've killed the wabbit."
• Arson, Murder, and Jaywalking: "Typhoons! Huwwicanes! Earthquakes! SMOOOOOOOOOOOOGGGGGGGGGG!"
• Ascend to a Higher Plane of Existence: It’s implied at the end that Elmer takes Bugs’ corpse to Valhalla.
• The Bad Guy Wins: Yes, you read that correctly. It's lampshaded, even.
• Big Shadow, Little Creature: The opening, when Elmer Fudd first appears.
• Brawn Hilda: Averted; Bugs as Brünnhilde is really quite petite. The horse "she" rides in on, however...◊ Chuck Jones explained that they threw every curve they had into her noble steed instead.
• Breaking the Fourth Wall: "Well, what did ya expect in an opera — a happy ending?"
• Catchphrase: Plays magnificently with Elmer's traditional desire to "Kill the wabbit!!"
• Classical Music Is Cool: No doubt this cartoon has convinced many fans that there’s something to this opera thing. Wagner's music still manages to sound impressively epic even amidst all the silly cartoon antics.
• Clothes Make the Superman: Elmer Fudd's "spear and magic helmet" allow him to control the weather and finally kill da wabbit... kind of.
• Cool Helmet: Elmer's magic helmet.
• Cool Horse: Bugs' horse is a strange mix of a Brawn Hilda and a beautiful white mare. Pretty neat.
• Cradling Your Kill: What Elmer does after he has killed da Wabbit.
• Darker and Edgier: Given it's a Looney Tunes short, it does conflict with the usual gleefully wacky house style. But it works.
  • The usual "That's All, Folks!" closing card is cut extremely short, not even animated or with its standard whimsical music; the score plays over it as it simply fades in and out as a static card.
• Dark Reprise: While Elmer is crying in remorse for "killing da wabbit", if one listens closely, an instrumental reprise of "Return My Love" is heard in the background. It's heard more clearly in the album version of the score. (This becomes even more fitting in light of the tune's original context, where it's sung by repentant sinners.)
• Department of Redundancy Department: When Bugs first approaches Elmer the mighty hunter, their dialogue parodies the often excessive internal repetition of operatic libretti:
  Bugs: [sings] Oh mighty warrior of great fighting stock, Might I inquire to ask, eh, what's up, doc?
  Elmer: [sings] I'm going to kill the wabbit!
  Bugs: [sings] O mighty hunter, 'twill be quite a task, How will you do it, might I inquire to ask?
  Elmer: [sings] I'll do it with my speaw and magic hewlmet!
  Bugs: [sings] Your spear and magic helmet?
  Elmer: [sings] Speaw and magic hewlmet!
  Bugs: [sings] Magic helmet?
  Elmer: [sings] Magic hewlmet!
  Bugs: [derisively] Magic pfelmet.
  Elmer: [sings] Yes! Magic hewlmet! And I’ll give you a sample!
  [Elmer uses his powers of thunder and lightning to reduce the tree Bugs is under to a cinder.]
  Bugs: [with an Oh, Crap! look on his face] Bye-eee! [Runs off.]
  Elmer: That was the wabbit!
• Disguised in Drag: Bugs, dressed as Brünnhilde.
• Downer Ending: Parodied. Elmer succeeds in killing Bugs, but weeps over the "poor widdle bunny". Lampshaded by Bugs while Breaking the Fourth Wall.
  "Well, what did ya expect in an opera? A happy ending?"
• Elmuh Fudd Syndwome: Siegfwied Fudd Syndwome!
  Elmer: I'll KILL DA WABBIT!
• Faking the Dead: Possibly, given that Bugs gets up to deliver the punchline at the end of the cartoon.
• Foe Romance Subtext: The usual Running Gag in shorts; Bugs Disguised in Drag, and Elmer falling head over heels for him. What's a little different here is that the "Return My Love" segment is pretty sappy, cliché and emotional yet still funny, while all other times Bugs pulled out his drag act it was only Played for Laughs.
• Fourth Wall Farewell: The ending features a supposedly dead Bugs Bunny suddenly turning to look at the camera and say, "Well, what did ya expect in an opera, a happy ending?"
• Gone Horribly Right: Elmer succeeds in his goal to kill the wabbit, but isn't very happy about it.
• Hat of Power: The magic helmet, of course.
• Heel Realization: Elmer at the end.
• Horny Vikings: Elmer's magic helmet has a pair of horns in the classic "viking" design. Justified here, in that the original opera was one of the Trope Codifiers.
• Mundane Made Awesome: It's amazing how much power you can put into yelling the word "smog".
• Musical Episode: Every line is sung to the tune of music by Wagner.
• My God, What Have I Done?:
  Elmer: What have I done?... I've killed da wabbit...
• Nerd in Evil's Helmet: Elmer Fudd wearing a magic helmet instead of his usual hunter cap.
• Not Quite Dead: Bugs at the end, presuming that Elmer Fudd has managed to strike Bugs down with his storms and got the impression that he really killed him.
• Not-So-Harmless Villain: Elmer Fudd is his usual bumbling self right up until he finally catches wise to Bugs' shenanigans, at which point he loses his temper, unleashes the full power of his magic helmet and ultimately succeeds in killing da wabbit.
• Oh, Crap!: Twice with Bugs when he realized the full extent of Elmer’s power:
  • When Bugs realizes Elmer wasn't bluffing about his helmet's powers — complete with doe eyes and drooping ears.
  • At the end of the big love song, Bugs’s wig and helmet fall off, and Bugs gives an "Oh, Crap!" Smile before pulling Elmer’s helmet down and running for his life. All of which is accompanied by a dramatic Drum Roll which signals the start of Elmer's Villainous Breakdown. When audiences heard it and saw Bugs running for his life, they knew things were going to REALLY go downhill.
• "Oh, Crap!" Smile: When Elmer realizes that Bugs duped him, the rabbit gives Elmer this kind of smile before he runs off.
• One-Winged Angel: While he doesn't actually turn into one, when he has a Villainous Breakdown, Elmer unleashes enough power that would make him seem capable of becoming this.
• Opera Means Drama: A famous example of how having opera music as the soundtrack elevates the drama of the story. Even the comical moments are made more epic by the Wagnerian score.
• Pietà Plagiarism: Elmer lifts Bugs' broken body in the La Pieta pose.
• Playful Pursuit: Elmer Fudd as Siegfried chases after Brunhilde as she dances in a flirty fashion, not realizing that she's really Bugs Bunny in disguise.
• Public Domain Soundtrack: Obviously; the entire piece is a pastiche of Richard Wagner's operas. Most famously, the Ride of the Valkyries is given the immortal lyrics, "Kill da wabbit, kill da wabbit, kill da wabbit..."
• Pyrrhic Victory: Elmer succeeds in killing Bugs, yes, but at the same time kills the...er...rabbit he loved and is overcome by grief and remorse. It makes perfect sense for the character. Every time Bugs fooled Elmer into thinking he got him before, Elmer broke down similarly. Perhaps he's not as cut out for hunting as he thinks he is. Or he should stick to hunting the non-sentient.
• Rage Breaking Point: When Elmer catches on to Bugs' tricks, all hell breaks loose.
• Red Eyes, Take Warning: Elmer gets this as well as everything around him glowing red with rage when he catches on to Bugs' tricks.
• Scenery Porn: Particularly when Elmer carries Bugs away.
• Shock and Awe: "Stwike, wightning! Stwike da wabbit!"
• Shout-Out: Beside all the opera references, the opening scene is also a parody of the "Night On Bald Mountain" segment of Fantasia (which, fittingly, was also set to classical music).
• Shown Their Work: This was one of the only Looney Tunes shorts in which the animators did extensive research (the other one being the notorious Coal Black and de Sebben Dwarfs). Professional ballet dancers were hired for the animators to study.
• Sophisticated as Hell: Opera motifs. Ballet. Love duets. Wagnerian motifs. Yet Siegfried is still out to "kill da wabbit."
• Stylistic Suck: Not the cartoon itself by any means, but the song "Return My Love" was deliberately written to be as sappy and cliché as possible.
• Subverted Rhyme Every Occasion: Downplayed. Bugs rhymes 'task' with 'ask', but he pronounces task with his usual Brooklyn accent and ask as a more British 'ahsk'.
• Team Rocket Wins: Notably one of the only three occurrences in Looney Tunes history where Elmer gets triumphant over Bugs, albeit the one where he doesn't get any satisfaction out of it.^note  The others are "Hare Brush" and "Rabbit Rampage", both from 1955.
• Tears from a Stone: As Bugs lies seemingly dead, rain drops falling from a flower make it seem as if it was mourning him.
• Tears of Remorse: Elmer when he finds Bugs' seemingly dead body.
• True Art Is Angsty: Invoked by Bugs at the Punchline.
• Unexplained Recovery: Bugs suddenly recovers, to deliver the Punchline.
• Unsettling Gender-Reveal: Brünnhilde was da wabbit! Leading to Elmer's Villainous Breakdown.
• Unstoppable Rage: Elmer gets this after catching wise to Bugs' trickery. See also: Red Eyes, Take Warning and Villainous Breakdown. In fact, it's likely the most angry he has ever been in any cartoon to date. It's no longer about hunting, or good sport. It's Personal. And perhaps the only instance in which he comes off as a truly frightening villain (it helps that he's ridiculously overpowered in this one as well).
• Valkyries: Bugs as Brünnhilde, obviously.
• Villainous Breakdown: When Elmer discovers who his love really is.
• Vocal Dissonance: As Elmer unleashes the elements on Bugs and screams, "SMOG!", it sounds significantly different than usual. That is actually Mel Blanc, not Arthur Q. Bryan, shouting that word, briefly sounding more like Yosemite Sam.
• Weather Manipulation: Siegfried-Elmer can control the weather using his magic helmet, from commanding the lightning to brewing a massive storm with typhoons, hurricanes, earthquakes, and smog.
• Wham Line: Not the words themselves, but how they're uttered.... Elmer's "I'll KILL DA WABBIT!!!" is genuinely frightening. Play-time is over!
• Wholesome Crossdresser: Bugs (as usual) disguises himself as a woman (specifically, Brünnhilde) to trick Elmer.
• Word, Schmord!: Bugs derisively refers to Elmer's magic helmet as "Magic pfelmet."

"Well, what did ya expect in an opera? A happy ending?"