Short Cuts: Roman Polanski, not-so-sweet ‘Grass’ and an unsettling ‘Orgy’

“Short Cuts” are expedient, pretension-free movie reviews. This installment tackles Roman Polanski’s “The Ghost Writer,” the star-studded B-movie “Leaves of Grass” and “All American Orgy,” the dark indie comedy featuring Sarah Silverman’s sister Laura that used to be called “Cummings Farm.”