the hall of egress
Adventure Time is known for its uniquely strange, inexplicable, symbolism-rich surrealist tendencies, but Hall of Egress is unique in these regards even within this canon. In it, Finn is trapped in his most most daunting dungeon crawl yet as he must escape a maze that doesn't end when he leaves the dungeon. The concept is presented abstractly enough that it has spawned dozens of entirely valid [i][/i]interpretations, so I am merely throwing my beanie into the ring. I believe Hall of Egress preludes Finn's character arc as Adventure Time enters its endgame phase.