A Philadelphia sound-effects man witnesses and records a car accident that turns out to be a politically motivated murder. Brian De Palma stylish and quite inspired mash up of Coppola’s The Conversation and Antonioni’s Blow Up remains one of the key conspiracy thrillers of the 1980s and was to have a profound influence on 90s directors as diverse as Quentin Tarantino and Oliver Stone. Blow Out is arguably De Palma’s masterpiece.