Continuity: The amount of straw that hits Butch while he is riding the bicycle.
Continuity: 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.
Continuity: The "foot pegs" through the front axle of the bicycle that Etta uses disappear during Butch's stunt performance and reappear afterwards.
Errors in geography: In the final shootout in San Vicente, there are trees all around the town and one in the plaza. The real San Vicente, Bolivia is at 4800 meters altitude (over 15,000 ft.), so is well above the tree line.
Revealing mistakes: During the climactic gun battle, Sundance fires his two six-guns at least 16 times without reloading. Obviously the guns would have to be reloaded after only 12 shots.
Continuity: In the river, Butch says to Sundance, "You're choking me! You're choking me!" although they're apart at this point.
Revealing mistakes: When they're eating at Etta's house, before and after Butch shouts, "You probably inherited every penny you got!" you can see Butch's shadow on the set.
Revealing mistakes: While the second train robbery is taking place, the Pinkertons arrive on the special train. The shot of the special train engine coming to a stop right in front of the camera was obviously filmed with the engine starting close to the camera and backing up, then the shot was run in reverse. Notice the steam is returning to the engine instead of coming out of it.
Errors in geography: Though the second half of the movie is supposedly set in Bolivia, all the Spanish-speaking actors have Mexican accents.
Factual errors: In the film, The Sundance Kid claims to have been born in New Jersey. The real Sundance Kid was born in born in Mont Clare, Pennsylvania.
Factual errors: At the climactic shootout, the shoulder insignia of the Bolivian army officers are wrong: instead of stripes, the shoulder boards should have six-pointed stars.