Continuity mistake: In the bicycle riding scene where Butch lets Etta ride on the handlebars, you can see her feet are resting on some sort of pegs protruding from the axle on each side of the bicycle wheel. When she is not riding, the pegs are not there.

Butch Cassidy and The Sundance Kid (1969)
1 continuity mistake - chronological order
Directed by: George Roy Hill
Starring: Robert Redford, Paul Newman, Katharine Ross, Strother Martin
Revealing mistake: In the opening sequence when Sundance shoots the gun belt off the card player, the film was cut to make the quick draw appear faster. You can see Butch's image jump across the screen in the background.
Trivia: The turn-of-the-century-style film (which plays alongside the opening credits) was originally intended to appear in the bulk of the story. On Butch, Sundance and Etta's trip through New York, they view this film, which depicts Butch and Sundance's deaths. It upsets Etta so much, it contributes to her later decision to return home by herself. The segment had an annoyed Butch and Sundance watching the film from the back of the theater, whispering comments like, "We never did that". The change was made when it was decided to make the trip through New York into a musical interlude over still-photos. The main reason for the change: the studio had just finished work on a "period" set of a New York street (ca.1900) for the film Hello Dolly and did not want this expensive set appearing in a different film first.





Answer: It's to show how Butch and Etta care about each other as friends and that Etta is not just someone Butch has to put up with because she's Sundance's woman. A strong bond unites the three of them.
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