History GainaxEnding / AdventureTime

* The "Tree Trunks" episode ends with the eponymous guest character taking a bite from the fruit they've been pursuing all episode. She explodes. [[EsotericHappyEnding Then we see her running, laughing, through crystal.]]
** That one got a MindScrewdriver in "Crystals Have Power".

* There was another one in "[[https://www.youtube.com/watch?v=RVXAqJQf6K4#t=10m20s The Chamber of Frozen Blades]]" when Gunter, one of the Ice King's penguins that he took to the hospital, lays an egg that hatches... into a floating, pink cat. Then the Ice King says, "[[NoodleIncident Gunter, why didn't you tell me?]]" ''[[NoodleIncident (Gunter says "Wa-wa-wa" as if to say "I don't know")]]'' "[[NoodleIncident Oh-ho-ho, Gunter-]]" as he is interrupted by Finn and Jake both kicking him. (While the cat would appear in later episodes, and it's revealed that Gunther is [[spoiler:an EldritchAbomination that existed for eons and was banished to Ooo as a penguin]], but still no proper explanation for the cat).

* There was another one in "[[https://www.youtube.com/watch?v=RVXAqJQf6K4#t=10m20s The Chamber of Frozen Blades]]" when Gunter, one of the Ice King's penguins that he took to the hospital, lays an egg that hatches... into a floating, pink cat. Then the Ice King says, "[[NoodleIncident Gunter, why didn't you tell me?]]" ''[[NoodleIncident (Gunter says "Wa-wa-wa" as if to say "I don't know")]]'' "[[NoodleIncident Oh-ho-ho, Gunter-]]" as he is interrupted by Finn and Jake both kicking him. (While the cat would appear in later episodes, and it's revealed that Gunther is [[spoiler: An EldritchAbomination that existed for eons that was banished to earth as a penguin]], but still no proper explanation for the cat).

* "Blank-Eyed Girl". The six Blank-Eyed Girls reveal that their huge blank eyes are just giant contact lenses and they had normal eyes underneath. Then they reveal that their hair isn't real. Then they unscrew their heads and shed their bodies, revealing them to be [[StarfishAliens featureless, star-shaped beings]] who leave Finn and Jake's house through the window and break up into dandelion seeds. Finn and Jake are completely baffled, while BMO finds it beautiful.

* There was another one in "[[http://www.youtube.com/watch?v=RVXAqJQf6K4#t=10m20s The Chamber of Frozen Blades]]" when Gunter, one of the Ice King's penguins that he took to the hospital, lays an egg that hatches... into a floating, pink cat. Then the Ice King says, "[[NoodleIncident Gunter, why didn't you tell me?]]" ''[[NoodleIncident (Gunter says "Wa-wa-wa" as if to say "I don't know")]]'' "[[NoodleIncident Oh-ho-ho, Gunter-]]" as he is interrupted by Finn and Jake both kicking him. (While the cat would appear in later episodes, it still hasn't been explained.)

* "Gaurdians of Sunshine" randomly ends with a "Game Over" screen. Note that Finn and Jake had already escaped from the video game by that point.

* "Blank-Eyed Girl". The six Blank-Eyed Girls reveal that their huge blank eyes are just giant contact lenses and they had normal eyes underneath. Then they reveal that their hair isn't real. Then they unscrew their heads and shed their bodies, revealing them to be featureless, star-shaped beings who leave Finn and Jake's house through the window and break up into dandelion seeds. Finn and Jake are completely baffled, while BMO finds it beautiful.

* "Blank-Eyed Girl". The six Blank-Eyed Girls reveal that their huge blank eyes are just giant contact lenses and they had normal eyes underneath. Then they reveal that their hair isn't real. Then they unscrew their heads and shed their bodies, revealing them to be featureless, star-shaped beings who leave Finn and Jake's house through the window and break up into dandelion seeds. Finn and Jake are weirded out, BMO finds it beautiful.

** Despite Finn's hand being restored and his vision never actually explained, his relationship with Breezy is resolved, because she was in love with the flower on his hand, and not him. After Finn and the flower are separated, she stops having any interest in him.

* Another example is at the end of "Her Parents" when Finn and Jake taste [[http://www.youtube.com/watch?v=a3NRzcn2PuI "Soy People,"]] which is said to taste exactly like humans... of which Finn is the last. Not at all helped by Jake actually saying, "Finn, you taste delicious!". [[http://youtu.be/a3NRzcn2PuI?t=37s Then Finn tastes it and grins as the background music slowly tenses and gets louder, to the point where it gets]] [[LoudnessWar distorted enough to blow out a speaker]].

* "Hug Wolf" ends with Finn managing to defeat the Alpha Hug Wolf who turns back into a female humanoid. Jake asks her for a hug to which she suddenly turns into the Tree monster from earlier, cue Jake screaming, cut to black.

** Despite restoring of the hand and Finn's vision never actually explained, their with Breezy relationship resolved, because she was in love with a flower on his hand, and not him. After flower and Finn was separated, she stop having any interest in him.

* "Blank-Eyed Girl". The six Blank-Eyed Girls reveal that their huge blank eyes are just giant contact lenses. Then they reveal that their hair isn't real. Then they unscrew their heads and shed their bodies, revealing them to be featureless, star-shaped beings who leave Finn and Jake's house through the window and break up into dandelion seeds. Finn and Jake are weirded out, BMO finds it beautiful.

* "Mama Said" ends with three Banana Guards knocking the King of Ooo unconscious by pushing him down a flight of stairs while he sits on a pizza that he believes may be able to fly. The guards then awkwardly break into the song "Mama Said" by The Shirelles.

** Despite restoring of the hand and Finn's vision never actually explained, their with Breezy relationship resolved, because she was in love with a flower on his hand, and not him. After flower and Finn was separated, she stop having any interest in him.

* "Breezy" ends with Finn and Breezy singing together about their love, which somehow causes the flower where Finn's arm used to be turn into a tree and explode, inexplicably regenerating his arm in the process. [[UnresolvedSexualTension Then the episode suddenly ends without Finn and Breezy's relationship being resolved.]]

* At the end of "Power Animal", Jake suddenly says "[[LampshadeHanging Let's]] [[IAmAHumanitarian go eat]] [[LetsMeetTheMeat Cinnamon Bun!]]"

* "Breezy" ends with Finn and Breezy singing together about their love, which somehow causes the flower where Finn's arm used to turn into a tree and explode, inexplicably regenerating his arm in the process. [[UnresolvedSexualTension Then the episode suddenly ends without Finn and Breezy's relationship being resolved.]]

* The ending of the season 4 finale "The Lich". In an attempt to stop The Lich from escaping through a portal conjured by the Enchiridion, Finn and Jake go through the portal and... we see what appears to be an alternate universe where Finn's clothes and face are different, he has a crudely-made prosthetic right arm, he plays the flute, Jake is a regular dog, and they live on a farm with Finn's mother. The episode ends when she asks Finn to come inside for something urgent. It was a cliffhanger to the events of season 5's two-parter premiere, "Finn the Human" and "Jake the Dog".

-->'''Squirrel:''' ''YOU SON OF A BLEEBLOB!'' '''''JAAAAAAAAAAAAAAAAAAAAAKE!!!'''''
-->'''Jake:''' ''(not recognizing the squirrel)'' Heey... yooooou.

* The ending of "Puhoy." Finn dies while in the pillow world and ends up back in the real world not remembering a thing. [[AllJustADream Was it a dream,]] [[OrWasItADream or did it really happen?]]
* The end of "Dungeon Train" where Finn shows Jake the future orb showing them washing dishes hinting that Finn won't be on the train forever. [[NoEnding The episode then ends abruptly.]]

* "Red Starved". Marceline sucks the red (or pink) out of Princess Bubblegum, and PB ends up as a deflated, grey sack. Then PB asks Finn for the "Spoon of Prosperity" that [[BrickJoke they were using at the beginning of the episode]]. PB puts the spoon on her nose which somehow turns her back to normal. They all leave the cave inside a giant sand worm.
* "Escape From the Citadel" ends with one of the most bizarre twists imaginable, with the show's BigBad [[OmnicidalManiac The Lich]] being reduced to a baby who is apparently going to be adopted by Mr. Pig and Tree Trunks, and is possibly the sole reason they will remain married.
* "Breezy" ends with Finn and Breezy singing together about their love, which somehow causes the flower where Finn's arm used to turn into a tree and explode, inexplicably regenerating his arm in the process. [[UnresolvedSexualTension Then the episode suddenly ends without Finn and Breezy's relationship being resolved.]]
* "Joshua and Margaret Investigations" is a WholeEpisodeFlashback told by Jake about the day he was born. At the end of the episode, Jake's parents decide to [[LetUsNeverSpeakOfThisAgain never tell Jake about the day he was born.]]
-->'''Jake:''' And so they never told me.\\
'''Finn:''' Never told you what?\\
'''Jake:''' [[UnreliableVoiceover I don't know. They never told me. Ha!]]

* In "The Other Tarts," The psychotic Tart Toter bursts into the castle, brandishing a chicken and a squirrel in place of tarts, foaming at the mouth. He says: "This cosmic dance bursting with decadence and withheld permissions twists all our arms collectively, but... If sweetness can win, (and it can!), then I'll still be here tomorrow to high-five you, yesterday, my friends. Peace." As he says this, the camera zooms in on his deranged, foaming face, and fades to the Tart Toter's delusion of drifting through space, surrounded by sweets, and LSP is in the space background, taking a donut. All of a sudden, it cuts back to the castle, where Finn cringes and says "Geesh...", and the episode ends.

* None of these even come CLOSE to the spectacularly weird ending of "The Other Tarts." The psychotic Tart Toter bursts into the castle, brandishing a chicken and a squirrel in place of tarts, foaming at the mouth. He says: "This cosmic dance bursting with decadence and withheld permissions twists all our arms collectively, but... If sweetness can win, (and it can!), then I'll still be here tomorrow to high-five you, yesterday, my friends. Peace." As he says this, the camera zooms in on his deranged, foaming face, and fades to the Tart Toter's delusion of drifting through space, surrounded by sweets, and LSP is in the space background, taking a donut. All of a sudden, it cuts back to the castle, where Finn cringes and says "Geesh...", and the episode ends.

\'''Finn:''' Never told you what?\\
\'''Jake:''' [[UnreliableVoiceover I don't know. They never told me. Ha!]]

* "Breezy" ends with Finn and Breezy singing together about their love, which somehow causes the flower where Finn's arm used to turn into a tree and explode, inexplicably regenerating his arm in the process. [[UnresolvedSexualTension Then the episode suddenly ends without Finn and Breezy's relationship being resolved.]]

''WesternAnimation/AdventureTime'' has so many weird episode endings that it gained its own page.\\

* The ending of the season 4 finale "The Lich". In an attempt to stop The Lich from escaping through a portal conjured by the Enchiridion, Finn and Jake go through the portal and... we see what appears to be an alternate universe where Finn's clothes and face are different, he has a crudely-made prosthetic right arm, he plays the flute, Jake is a regular dog, and they live on a farm with Finn's mother. The episode ends when she asks Finn to come inside for something urgent.
** It was a cliffhanger to the events of season 5's two-parter premiere, "Finn the Human" and "Jake the Dog".

* "The New Frontier" ends with Finn pretending to be a ghost while chasing Jake around the cave, and right afterwards comes a [[EsotericHappyEnding short sequence containing Banana Man doing a dance against a multicolored background]].
** Note the fact that before that sequence began, Banana Man was shown passed out in the pool. Maybe the sequence after that was him dreaming.

* "Breezy" ends with Finn and Breezy singing together about their love, which somehow causes the flower where Finn's arm used to turn into a tree and explode, inexplicably regenerating his arm in the process. [[NoEnding Then the episode suddenly ends without Finn and Breezy's relationship being resolved.]]

* "Escape From the Citadel" ends with one of the most bizarre twists imaginable, with the show's BigBad [[OmnicidalManiac The Lich]] being reduced to a baby who is apparently going to be adopted by Mr. Pig and Tree Trunks, and is possibly the sole reason they will remain married.

* "Red Starved". Marceline sucks the red (or pink) out of Princess Bubblegum, and PB ends up as a deflated, grey sack. Then PB asks Finn for the "Spoon of Prosperity" that [[BrickJoke they were using at the beginning of the episode]]. PB puts the spoon on her nose which somehow turns her back to normal. They all leave the cave inside a giant sand worm.

* This mixes with [[SugarWiki/FunnyMoments Crowning Moment of Funny]] at the end of "Power Animal" when Jake suddenly says "[[LampshadeHanging Let's]] [[IAmAHumanitarian go eat]] [[LetsMeetTheMeat Cinnamon Bun!]]"

-->'''Jake:''' ''(not recognizing the squirrel)'' [[SugarWiki/FunnyMoments Heey... yooooou.]]