Last year’s smash horror hit “The Substance” was an exercise in excess. The film featured gnarly practical effects, outsized, absurdist humor and enough fake blood to fill a local water tower. But among all of the sequences designed to both titillate and nauseate viewers in Coralie Fargeat’s feature, about an aging celebrity who makes a Faustian deal to turn into a younger, perfect version of herself through the use of a black market drug, one stands out as the most jaw-dropping. A young woman named Sue, played with extraordinary bite by Margaret Qualley, steps onto the neon-saturated set of a popular television workout show and looks directly into the camera. “It’s time to pump it up,” Sue says. “Are you ready?” With a wink and a flick of her ponytail, Sue and six other dancers — all spor

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