* AlternateAesopInterpretation: People have used the show and the book it's based on, specifically the [[{{Anvilicious}} repeated]] quotation "[[AnAesop A person's a person, no matter how small]]", as an argument against abortion ([[{{Irony}} though Seuss himself was pro-choice).]]
* AlternateCharacterInterpretation:
** Mayzie: An AlphaBitch or TheDitz who is more vain than mean?
*** When she leaves the show: is she ditching the egg with Horton, or does she genuinely believe she's made his life better by making him an egg sitting circus sensation"? The song could go either way. And is she self-aware enough to know that Horton will be a ''far'' better parent than her?
** The Cat has a few of these. Are they a {{Tulpa}}, created by Jojo? Are they more like a GreatGazoo (a trickster just having fun) or a benevolent version of [[Theatre/{{Pippin}} The Lead Player]] (a [[ComedicSociopathy slightly sociopathic]] and [[CreepyGood creepy]], but ultimately good-hearted character), or are they there specifically to help Horton save Who, Jojo to become a Thinker, and essentially help the characters along?
%%* SugarWiki/AwesomeMusic: Pretty much all of it.
* BigLippedAlligatorMoment: "Havin' a Hunch" comes out of NOWHERE, has basically nothing to do with the main story, has some weird dance involving glow-in-the-dark gloves, and is never referred to again. BLAM. The song ''does'' reunite Jojo with his parents, but almost no explanation is given as to how it did so. Of course, it is a reference to "Hunches in Bunches", but such a book is pretty hard to fit into the plot otherwise.
* VindicatedByHistory: The play was a BoxOfficeBomb and received very mixed reviews from critics and audiences at the time. After it got reworked and high schools started performing it, many musical theatre fans have begun to appreciate the show for the charming tribute to Seuss that is.
%%* IronWoobie: Horton WILL hatch that egg!!
* SignatureSong: "Alone in The Universe" is the show's most well-known song for being a gigantic TearJerker of a number as well as being the Act 1 finale.
%%* TheWoobie: Jojo.
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