* AlternativeCharacterInterpretation: Was the Postman crying at the end because [[spoiler: he was defeated]] or were they TearsOfJoy? If you look below, one of his reasons for hating Christmas was being put on the naughty list, so it's possible that [[spoiler: he was touched that the penguins gave him a gift, even if it was raw fish]].
* FridgeHorror: [[spoiler: So, is that mailman going to be trapped at the zoo, mistaken for a penguin and treated as such, unable to talk and tell people he isn't, for the rest of his life?]]
** [[AssholeVictim What, he didn't have it coming?]]
** [[EvenEvilHasStandards No one deserves raw fish.]] Except maybe real penguins...
* HilariousInHindsight[=/=]HeartwarmingInHindsight: Drew Barrymore's first born daughter's name is Olive.
* JerkassWoobie: The Postman. The reason he hates the Christmas season is because it greatly adds to his workload. People who have to consistently work during Christmas can probably sympathize with him. Although, it ''is'' implied that the true reason is because he's mad at Santa for putting him on the naughty list.
* LawfulEvil: The Postman may be trying to stop Christmas, but he always follows postal regulations.
* {{Moe}}: Olive manages to be one '''and''' a strong character at the same time.
* TheWoobie: Olive totally fits this trope.