Blow Out

Thriller about a film soundman who, while collecting sound effects, inadvertently records vital evidence when a prominent senator's car plunges into a river. He manages to rescue a woman who was in the car, but is unable to save the senator. When he discovers that what he assumed to be a tyre blow-out was really a gunshot, he realises that he has stumbled across a political murder - and that his own life is now in danger.