Blow Out is a 1981 thriller film, written and directed by Brian De Palma. The title and themes derive from and are an homage to Michelangelo Antonioni's 1966 film Blowup. The film stars John Travolta as Jack Terry, a movie sound effects technician from Philadelphia who, while recording sounds for a low-budget horror film, accidentally captures audio evidence of the possible assassination of the Pennsylvania governor who was planning to run for President. The supporting cast included Nancy Allen (in the role of Sally, a prostitute who was riding in the governor's limousine when he was killed), Dennis Franz as sleazy private investigator, Manny Karp, a Zapruderesque figure, and John Lithgow as the coldblooded assassin Burke aka 'The Liberty Bell Strangler'.

This stylish Brian DePalma thriller plays off the theme of the unsuspecting witness who discovers a crime and is thereby put in grave danger, but with a novel twist. Jack is a sound-man who works on "Grade-B" horror movies. Late one evening, he is "sampling" sounds for use on his movies, when he hears something unexpected through his sound equipment and records it. Curiosity gets the better of him when the media become involved, and he begins to unravel the pieces of a nefarious conspiracy. As he struggles to survive against his shadowy enemies and expose the truth, he doesn't know who he can trust. Written by Tad Dibbern