[[quoteright:1000:https://static.tvtropes.org/pmwiki/pub/images/3520031.jpg]]
[[caption-width-right:1000:[[SarcasmMode Just a totally regular day at the park]].]]
"First Day" is the PilotEpisode of ''Regular Show'', intended for the failed Cartoon Network anthology series ''The Cartoonstitute''. While it went unaired, it was released on the Cartoon Network website on August 14, 2009 and later was given an extended DirectorsCut that aired as the 25th episode in Season 2 (though the original version is still easy to find online).

Two twenty-three year old slackers, a blue jay named Mordecai and a racoon named Rigby, answer a help wanted ad in the paper for groundskeepers at the local park. Upon their arrival, they meet the owner's son, Pops Maellard, who hires them on the spot. The next day, their very first assignment to throw away an uncomfortable chair goes horribly wrong when Mordecai and Rigby play an intense game of Rock, Paper, Scissors to see who gets to keep it and inadvertently summon a black hole. And that's just the beginning of the duo's crazy adventures at the Park...


!!Tropes:

* ArtEvolution: It's quite noticeable what the new scenes are, as they are drawn in the cleaner style of the TV show compared to the looser style of the pilot.
* {{Bookends}}: The recut at the beginning and the end have a scene where Mordecai and Rigby both promise that starting in that moment to not do anything to screw up the job.
* CallForward: Margaret has a non-speaking cameo during the beginning of the extended cut, and this episode takes place before "[[Recap/RegularShowS01Ep03CaffeinatedConcertTickets Caffeinated Concert Tickets]]", her actual first appearance.
* CallingYourAttacks: Mordecai announces to Rigby that he will throw rock before the 101th round of Rock, Paper, Scissors so that Rigby can win the game and break the tie.
* EarlyInstallmentWeirdness: Being that this was originally the pilot episode, there were quite a few differences:
** The animation is a lot more bouncy and cartoonish. Using a lot more squash and stretch and smears than the final show does.
** Rigby compared to how he is normally was less hyperactive and was more sulky and moody. He also in the original cut had two teeth that got replaced with full teeth in the remake. According to the DVD Commentary, JG changed it because it made him look too much like a little kid.
** There are many shots throughout the episode (such as when Mordecai punches him in the shoulder and when they play Rock, Paper, Scissors) where Rigby's mouth is connected to his snout. He is very rarely drawn like this in the rest of show.
** Muscle Man and High Five Ghost only made a small cameo in the original pilot and didn't have any lines. However, new scenes with them were added in the recut.
** Remains of the original idea of the show taking place at human zoo are shown in some of the pilot backgrounds.
** During the climax, Benson of all people is the one to know what to do to stop the current disaster, when usually it's ''Skips'' who knows it.
* EasilyImpressed: Pops is a bit too absorbed in Mordecai and Rigby's Rock, Paper, Scissors match.
* EatingTheEyeCandy: In the extended cut, Muscle Man stops mowing the lawn to check out Margaret's tail feathers.
* EstablishingCharacterMoment: Some characters get a few, fitting the role of a pilot episode (note that character with (*) next to them means they were added in the recut):
** Rigby*: The first thing he does upon arriving at the park is make fun of the size of Pops' head (prompting Mordecai to punch him), establishing him as a {{Jerkass}}. His first lines are a reluctance to wake up to work on his first day, as he sleeps in a pile of underwear and clothes (also somehow accumulated in one day despite his not wearing clothes), setting him up as [[TheSlacker a slacker]] and [[ThePigPen dirty]].
** Mordecai*: Quick to get Rigby to stop making fun of Pops and ready to get to work with his morning alarm, Mordecai is set up as more responsible to Rigby, though his second set of lines establish he's well aware of Rigby's faults and tolerates it to a point.
** The end of the episode establishes that Mordecai and Rigby as a pair [[AesopAmnesia don't really learn from their mistakes easily]] and will readily repeat them.
** Pops: Greets Mordecai and Rigby at the entrance and gives them lollipops he keeps in his shirt*, showing him to be sweet but a bit eccentric.
** Benson: Sharply calls out Rigby for standing on the table while eating, setting him up as a by the book authority figure who can get loud quickly.
** Muscle Man*: His second line is a "My Mom" joke, setting up his weird sense of humor.
** High Five Ghost*: Only exists to back up Muscle Man.
** Skips: Jumps into action with strength and experience, putting his capability at the forefront of his character.
* EstablishingSeriesMoment: The climax of the episode, where after tieing one hundred times, a black hole monster who summons a black hole to eat their chair.
* HereWeGoAgain: After the pair repromises to not do anything to screw up their job, Rigby suggest another game of Rock, Paper, Scissors for who drives the cart.
* ILetYouWin: Mordecai lets Rigby win the 101st round of Rock, Paper, Scissors to break the tie and stop the black hole.
* LazyBum: According to Mordecai, Rigby was too lazy to fill out his work application; Mordecai had to do so for him.
-->'''Rigby:''' [[IResembleThatRemark Just because I was too lazy to do something boring like filling in a job application doesn't mean I'm lazy.]]
* NotHyperbole: Benson warns Mordecai and Rigby not to play Rock, Paper, Scissors as it's an "evil" game, though they ignore his warning. Later it turns out to actually be an evil game as their 100th tie summons a black hole to eat the chair they were competing over.
* MundaneObjectAmazement: Mordecai and Rigby decide that the chair Pops wanted to throw out is somehow the coolest chair ever even after sitting in it and finding it uncomfortable, to the point where Mordecai and Rigby compete in a 101 round-long game of Rock, Paper, Scissors to win it.
* OriginsEpisode: Depicts Mordecai and Rigby's first day on the job, but since this episode was released in the middle of season 2, this episode becomes this trope.
* MundaneMadeAwesome: A crowd gathers to watch Mordecai and Rigby's epic Rock, Paper, Scissors match.
* MutualDisadvantage: Mordecai and Rigby somehow tie in Rock, Paper, Scissors ''one hundred times!''
* {{Pilot}}: Was created by series creator J.G. Quintel to pitch the show to Cartoon Network, and was supposed to be aired as part of the anthology series that never came to be, ''The Cartoonstitute''. It aired as part of Season 2 with some extra scenes.
* ReCut: Of the pilot.
* SeriousBusiness: Rock, Paper, Scissors. It's an evil game with dire consequences.
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