The humor, too, is quintessentially British. The film is littered with puns, sight gags (a sewage pipe labeled "Whitehall," a subway station called "Pearly Kings Cross"), and a Greek chorus of singing slugs. These tiny, mucus-trailing mollusks pop up at random intervals to narrate the action, comment on the characters’ feelings, or simply sing a jaunty sea shanty. They are, without question, the film’s secret weapon.
Beneath the slapstick and toilet jokes lies a surprisingly nuanced story about class and belonging. Roddy starts as a snob who looks down on anything "un-Kensington." Rita is a pragmatic, blue-collar worker who comes from a sprawling, loving family of 27 siblings, all living in a sunken ship. The film gently mocks Roddy’s pretensions while also showing that his refined skills (knowledge of opera, impeccable manners) can be just as useful as Rita’s grit. Flushed Away
Critics praised its witty script, vocal performances (McKellen’s Toad is a riot; Winslet’s Rita is a grounded delight), and breakneck pacing. The film also represents a fascinating technical bridge between traditional stop-motion and digital animation. The humor, too, is quintessentially British