The demented, hyperactive dark comedy Detention , by music-video veteran and Torque auteur Joseph Kahn, begins as a bald-faced Scream knock-off, but by the time it races to a surprisingly satisfying conclusion, it’s nakedly appropriated bits and pieces from just about every beloved Gen-X cult movie of the past 30 years—including, but not limited to, Back To The Future , Donnie Darko , The Fly , Southland Tales , The Breakfast Club , Juno , and She’s All That .