* Unlike the rest of the series, this movie is considerably a lot darker and has plenty of horror elements. There's [[KnightOfCerebus Dennis]], the seriously threatening thugs, the brainwashing bucket helmets, the skull infested area, [[AndIMustScream the horrible looking monsters]], the trench, the diver, and the climax involving drying up and turning into non-anthropomorphic animals in a gift shop. Worse than all of that, [[ArsonMurderAndJaywalking ALL HAIL PLANKTON!!!]]
* The activation of the bucket helmets.
** [[InefficientSympatheticVillain Plankton]] going NotSoHarmlessVillain (to the point of [[KickTheDog pretty much crossing]] the MoralEventHorizon) is terrifying [[BewareTheSillyOnes as well]] [[VillainousBreakdown considering]] how [[HarmlessVillain he usually is]].
* The old lady at the ice cream stand, who turns out to be some kind of giant monstrous [[AlluringAnglerfish anglerfish]].
* The GIGANTIC deep-sea eel that swallows the anglerfish and the Patty Wagon. It's so monstrous and quite spooky-looking that it surprises Spongebob and Patrick.
''ALL HAIL PLANKTON!!!''