God bless our humble upper-middle-class high-rise co-op and keep it free from smut peddlers, militants, urban guerrillas and Greenwich Village liberals. Brian De Palma’s darkly twisted third feature is an absurdly audacious comedy free-for-all. Hired to make a porn flick, a Vietnam vet/aspiring filmmaker (Robert De Niro) turns his camera towards his neighbors in the apartment building across the way, launching a bizarrely funny and unpredictable series of events of personal and political upheaval.