"The Old Grey Hare" is a Creator/BobClampett [[WesternAnimation/LooneyTunes Merry Melodies]] short released in 1944.

Elmer Fudd, frustrated with his inability to catch Bugs, sits under a tree and is transported into the far off year 2000 (which, back then, was considered futuristic and far-off). Now an old man armed with a laser gun, he goes after an equally aged Bugs Bunny and upon managing to succeed, Bugs sets up a flashback to when they were young children and how it all began. As Bugs feigns his death and digs his own grave, he manages to trick Elmer inside and bury him alive.

It was considered for The50GreatestCartoons, but only managed to end as a runner-up.

!!This short features:
* AsTheGoodBookSays: As Bugs buries Elmer with sand he calls him Methuselah.
* BlackComedy: Elmer is buried ''alive'' and given a stick of dynamite, which explodes off screen.
* BuriedAlive: Done to Elmer.
* CrackOhMyBack: While running away, Old Bugs complains about his lumbago.
* CreditsGag: After the film irises out when Bugs hands Elmer the stick of dynamite, the ending title card violently shakes when the bomb goes off. Most TV versions replace the shaking card with one that doesn't shake (though the sound is still there). Creator/CartoonNetwork was one of the channels that aired this cartoon with the non-shaking end card, but ''The Creator/BobClampett Show'' actually aired it the way it was meant to be.
* DisappearedDad[=/=]MissingMom: We see rabbit holes for both Baby Bugs' father and mother but neither parent appears onscreen.
* EveryoneWentToSchoolTogether: According to this cartoon, Bugs and Elmer first met as babies.
* FailedFutureForecast:
** At one point, it's mentioned that Music/BingCrosby is still alive in the year 2000 (while he died in 1977 in RealLife) and still waiting for his horse to cross the finish line.
** A newspaper headline reads that "Smellevision replaces Television: Carl Stalling Sez It Will Never Work!". By the time the year 2000 came along tv is as popular as it ever was and Looney Tunes composer Stalling had passed away in 1972.
** What ''is'' funny, though, is that in 2002 the show ''WesternAnimation/BabyLooneyTunes'' would debut, which features a baby version of Bugs and Elmer rather similar to this cartoon.
* {{Flashback}}: Elmer flashes back to when he and Bugs were babies.
* FreeRangeChildren: According to the flashback Elmer was already chasing Bugs when they were babies. Which makes you wonder where their parents where at?
* FutureLoser: Elmer is still the same loser in 2000 as he was in the 1940s.
* MidBattleTeaBreak: Baby Bugs and Baby Elmer stop in the middle of a chase for nap time.
* NonStandardCharacterDesign: It bears noting that this is the ''only'' Bugs Bunny cartoon where his regular design is never used. Bugs only appears as either a decrepit elder, or as an infant.
* OriginStory: It is implied that Bugs and Elmer have been chasing one another from babyhood on.
* PinballGag: When Bugs is hit, score points flash around him, ending with a big "TILT"/
* {{Pun}}: Elmer's grave reads "Rest in Pieces".
* PunBasedTitle: "The Old Grey '''M'''are" is a traditional song.
* RidiculouslyCuteCritter: Bugs Bunny as a baby.
* RidiculouslySuccessfulFutureSelf: Even in old age Bugs is still able to fool Elmer like he always did.
* ShoutOut: Bugs' final line "Well, now, I wouldn't say ''that''!" is a reference to the popular catchphrase of the character Richard Q. Peavey in ''Radio/TheGreatGildersleeve''.
* SomethingCompletelyDifferent: We never saw baby or old age versions of Bugs and Elmer before. We also never see Bugs in his natural appearance for the entire short.
* SpinoffBabies: Kind of, Elmer and Bugs are shown as babies in a flashback.
* StandardSnippet: The music heard when Elmer digs Bugs' grave is "Träumerei" by Music/RobertSchumann.
* TimeSkip: Bugs and Elmer are shown in then distant year of 2000, where they are both old.
* TwentyMinutesIntoTheFuture: Elmer and Bugs are shown in what was then half a century later.
* WhatTheHellHero: This is one cartoon where the otherwise heroic Bugs who easily wins the audience's sympathy by defeating his aggressors actually comes across as being extremely cruel. Some TV airings have altered the ending a bit because of the scene where he literally buries Elmer alive and even then gives him a stick of dynamite, which explodes off screen. We don't learn whether this actually killed off Elmer, but it's still quite dark.