The quote 'We rob banks' is the simple mission of the legends in 'Bonnie and Clyde.' To capture the frantic energy of their escapes, the film used 'Foggy Mountain Breakdown' by Flatt & Scruggs, featuring the five-string banjo. The banjo's rapid-fire, 'three-finger' picking style became the sound of the 1930s rural crime spree. The instrument's bright, percussive quality provided a sharp contrast to the film's shocking violence. This use of bluegrass music in a mainstream film was revolutionary, proving that a 'regional' instrument could define the pace and excitement of a Hollywood movie legend. The banjo became synonymous with the 'outlaw' spirit, perfectly matching the film's rebellious and tragic dialogue.