* CrackPairing: [[spoiler:Trillian and Wowbagger.]]
* FunnyAneurysmMoment: There is a line in the book that references Ford Prefect puffing and panting after running a short distance, followed by the joke that "Writers are not used to that kind of exercise". Douglas Adams, the series' progenitor, died of a heart attack he sustained while working out.
* OnlyTheCreatorDoesItRight: At least a significant portion of the Creator/DouglasAdams fans out there were not at all satisfied with this book.
** EoinColfer at least acknowledges this at the start of the book, in a roundabout way not unlike most of Adams' trademark [[SeinfeldianConversation Seinfeldian Side Stories]]: the [[TrilogyCreep five of three results]] given for typing "[[BigBookOfEverything The Hitchhiker's Guide to the Galaxy]]" [[LogicBomb into the book itself]] (which is an analogy for the five stories by Adams) are described as "[[Literature/TheHitchhikersGuideToTheGalaxy -a lengthy article]] [[ArchivePanic accompanied by many hours of]] [[Series/TheHitchhikersGuideToTheGalaxy video]] and [[Radio/TheHitchhikersGuideToTheGalaxy audio files]], [[Film/TheHitchhikersGuideToTheGalaxy and some dramatic reconstructions]] [[AllStarCast featuring quite well-known actors]]." ''Then'' it lists [[DamnedByFaintPraise a text-only appendix at the bottom of the screen]] (obviously Colfer's entry) "[[SoOkayItsAverage -with absolutely no audio, and not so much as a frame of video shot by a student director who made the whole thing in his bedroom and paid his drama soc. mates with sandwiches.]]" - before admitting "[[SelfDeprecation This is the story of that appendix]]"
* RescuedFromTheScrappyHeap:
** Trillian, who came across as a very poor mother in ''Literature/MostlyHarmless'', thanks to her MarriedToTheJob lifestyle, is much more sympathetic here and spends a lot of the book dealing with her guilt over how she raised Random.
** Random herself, thanks to her LotusEaterMachine experience of serving as Galactic President, transcends her original EmoTeen characterization and now has ambitions of opening Earth up to contact with the rest of the galaxy.
* {{Squick}}: Zaphod's spare neck hole.
* StrangledByTheRedString: [[spoiler:Trillian and Wowbagger,]] {{justified}} by the fact dark space amplifies emotions.
* TheyChangedItNowItSucks:
** "Frood" isn't an adjective! Zark is spelled with a lower-case z! [[SarcasmMode Did this guy even read the first five books?]]