The opening scene of Once Upon a Time in America establishes several conventions of the thriller genre through characters, lighting, shots, and more. Eve Phyllis is portrayed as an attractive yet potentially deceptive femme fatale. The detectives are threatening antagonists emerging from shadows. Chiaroscuro lighting and shots from Eve's point of view build mystery, suspense, and a sense of danger. A high angle shot after Eve's death underscores her weakened state and loss of power compared to the detectives looming over her. Overall, the scene sets up generic thriller elements through its portrayal of characters and use of camera techniques.