Train

The train appears in the episode "Mystery Train", where it is used to take Finn to his birthday party. Throughout the episode, passengers mysteriously die, leaving nothing but skeletons behind. The conductor is a creepy, almost pedophile-like pink man. However, at the end of the episode, it is revealed that Jake was masquerading as the conductor when Finn wasn't lookind, and, being an avid trickster, set the whole murder scenario up for fun, with the help of the passengers. The train is more or less destroyed when, after all the cars are released, Finn stabs the main control panel, causing the train to be unable to stop. It hurdles off the tracks onto a huge gelatin mound that was put there by accident. The train has posters that say "Watch out for U.F.Os", suggesting U.F.Os exist or are at least rumored to exist in Ooo.  The train resembles an early 1800 hundreds train, with the interior having a bit of a subway train influence. It is doubtful that the train will ever be featured again, as the locomotive is all that remains, and it has a broken ccontrol panel.