These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Although it's apparently intended to be serious, as Roger Ebert noted, Mitch is a completely absurd, Flanderized caricature of an abusive husband; not just a hybridization of Germaine Greer's worst nightmare, and Godzilla in human form, he's also, for the purposes of the plot, practically omnipotent. The scene where he rampages through the house of Slim's terrified parents is particularly amusing. Mitch himself may not necessarily be in it For the Evulz (he's generally shown to be angry), but that's no reason for us in the audience not to be.
Slim suddenly has a self-defense coach, who teaches her and her alone, and even briefly narrates the final fight as if to say "use the force".
Jennifer Lopez and Juliette Lewis' joint-catchphrase. "Piece of cake" "Piece of Pie". Repeated numerous times throughout the film, towards the end they even abbreviate it to the non-sequitur "Cake" "Pie"