!!FridgeBrilliance
* In the posters for ''WesternAnimation/HortonHearsAWho2008'', I never really understood why it looked like Jojo was about to blow into a horn. Years later, I realized it's supposed to represent his defining moment in the movie when he [[spoiler: saves the Who world by shouting "Yopp!" into that very horn.]]
* Despite Jojo being claimed to be the smallest of his kind, one of his sisters is smaller than him. It can be explained that she's still a baby and once she grows up, she'll be taller than him.
* The mayor's sudden, yet clever idea of sticking a horn into the drainpipe as a means of deciphering Horton's voice shows a certain insight toward the distortion and amplification of sound on his part. [[spoiler: The same insight Jojo would've required to construct his symphony of gigantic instruments. The two of them aren't so different, after all.]]

!!FridgeHorror
* After frantically searching for the clover, Horton is described as being "more dead than alive". When you read the book as a kid, you think nothing of it...but when you happen upon it when you're older, you suddenly think "Oh my god, is he about to [[FamilyUnfriendlyDeath die]] [[CruelAndUnusualDeath from]] [[NightmareFuel exhaustion]]?!"