Finn is in the Bat Kingdom, battling Bat King.
BAT KING: You can't beat me!
FINN: Oh, yeah? Why is that?!
Finn and Bat King have a huge fight that leads them to a cliff.
BAT KING: Because you aren't a hero!
FINN: Wh--- wha?
Bat King grabs Finn's sword and flings it and Finn both into the air, and they fall off the cliff.
BAT KING: You're as bad as me! You baaaad little boy! BWAHAHAHA!
FINN: B... Wh... I.. I'm not... B-b-b-b-bad... I...
Finn almost hits the ground, until Jake stretches over and catches him.
JAKE: Chill, man!
FINN: I can't! He called me a... he... I... I'm a hero!
FINN: Okay. Just stretch us out of here.
JAKE: But Bat King kidnapped Hot Dog Princess... and he wants to eat her!
FINN: I don't care. I can't save her.... I'm just a bad little boy.
Back at the Tree Fort...
BMO: Finn, want to play Super Good Boys?
FINN: No. Because I'm a Super BAD Boy.
FINN: BAD BOY!
Finn tackles BMO and starts punching him.
BMO: My face!
Jake stretches to giant size and grabs Finn, then stretches his hand into a cage to hold Finn.
JAKE: Calm down!
Jake stretches his fist into the cage so he can flick Finn's eye.
FINN: MY EYE! YOU HURT MY EYEBALL! HIIIISSSSSSS!!!
Finn starts biting the inside of the cage.
Jake stretches his hand back to normal, dropping Finn.
Finn charges at BMO.
FINN: I WILL KILLLLLLL YA!
BMO: Aaah! Aaah! Aaah!
Finn grabs BMO and drop kicks him out the window.
Finn leaps out the window.
JAKE: (sighs) Oh, Finn.... Bat King really messed him up....
At the Candy Kingdom....
BANANA GUARD: Princess! AAAH!
Princess Bubblegum steps outside the castle.
PRINCESS BUBBLEGUM: Finn!
P.B. sees Finn chomping on the Banana Guard's leg like a rabid dog.
BANANA GUARD: Owy! Owy! Owy! My footy! Footy! Footy!
Finn lets the Banana Guard loose and turns to P.B.
The Gumball Guardians get up and grab Finn.
FINN: Let me go! Or I'll.... I'll...
GUMBALL GUARDIAN: Ha. Ha.
GUMBALL GUARDIAN: You. Are. Creepy.
Jake and BMO run up.
JAKE: Finn! Bad boy! Bad BAD boy!
Finn stops hissing and gasps.
FINN: Bad boy...
Finn has a flashback of his battle with Bat King.
FINN: Bat King!!!!!!!
JAKE: Yeah, man!
Jake stretches up and grabs Finn, then stretches him back down.
JAKE: Let's roll!
Jake, Finn, and BMO run to the Bat Kingdom.
FINN: This... is... MATH!!!!!
Finn, Jake, and BMO arrive at the Bat Kingdom and see Bat King trying to eat Hot Dog Princess.
BAT KING: Where do I bite this thing?
HOT DOG PRINCESS: Aaaah!
JAKE: Stretch cannon?
FINN: Stretch cannon!
BMO: Super Good Boys!
FINN: Ooooo.... kay?
Jake stretches into the form of a cannon, and Finn jumps inside him.
Jake shoots Finn right at Bat King.
BAT KING: Huh? AAAAH!
Finn kicks Bat King and begins punching him.
BAT KING: Aaah! I'm... trying to eat!
FINN: Be quiet, you BAD little boy!
BAT KING: Hey, this is just because I called you a bad guy!
FINN: Know.... it's because I'm a HERO! YAAAAH!
BAT KING: Ow!
JAKE: Let's roll! I got Hot Dog Princess!
Finn, Jake, and BMO flee from Bat King and his minions.
Back at the Tree Fort....
FINN: That was fffffffuuun.....
JAKE: Heh... yeah.
BMO: Super Good Boys?
FINN: Super Good Boys.
BMO and Finn smile.