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Continuity
During Jack Beauregard and Nobody's first street showdown, the sunlight and shadows clearly indicate late afternoon. Then Jack looks out in the distance and sees the Wild Bunch riding into town, and suddenly the sun and shadows indicate late morning or midday.
When Nobody arrives with the train to the site of Jack's final showdown with the Wild Bunch, telegraph poles are in plain sight along the track. At the end Jack decides to have his fight, and when the scene changes to the panorama view with the whole length of the train, all of the poles are gone.
In the barbershop opening scene when the would-be bushwacker lifts the shaving-cream brush out of the cup and rotates it to stuff it into the barber's mouth, it is clean and dry. As he lifts it to the barber's mouth and actually stuffs it in, shaving cream covers it, then fills the barber's mouth once it's inserted.
When Nobody takes off with the train, the last car is a caboose; just a while later when the train comes to Jack Beauregard's aid, a flat-car is attached behind the caboose.
The Wild Bunch is repeatedly stated to be 150 strong, but only 70 riders at most are shown in the group in the film.
When Nobody enters the saloon as Squirrel is playing the drinking Shooting game, Squirrel's glass changes from a scalloped, rounded glass to a straight-edged glass and back. As Squirrel drinks from his glass, it is straight-edged; he throws it and Nobody catches it and it's a scalloped glass again.
The photographer is shown using flash powder to illuminate the gunfight; since the shootout takes place in bright daylight, this is unnecessary and wouldn't give enough light to be useful at the distance shown anyway.
The locomotive is shown to be a coal-burning type, but has a "diamond" stack of the type used on wood-burning locomotives to trap embers and sparks.
During the drinking/shooting competition in the bar, Nessuno (Nobody) lifts one of the smaller drinks with his right hand, as it appears in the mirror. The next shot is a close up and he has the drink in his left hand.
Mistakenly thought of as a continuity error: The right hand reversal is because the camera shot is into the mirror above Nobody; the shot is obviously angled toward the floor because of the height and angle of the mirror over the bar. The next wide-angle shot shows the mirror and the left hand holding the drink reflected in the mirror, the drink appearing to be be his right hand as shown in the previous shot.
Mistakenly thought of as a continuity error: The right hand reversal is because the camera shot is into the mirror above Nobody; the shot is obviously angled toward the floor because of the height and angle of the mirror over the bar. The next wide-angle shot shows the mirror and the left hand holding the drink reflected in the mirror, the drink appearing to be be his right hand as shown in the previous shot.
The "gold" bars being loaded into the train are obviously fake slugs of undetermined material; the brush strokes of the gold paint used to create the gold-bar illusion are obvious.
When the Wild Bunch rides up to the train toward the movie's end, a tire is clearly visible lying in the field.
When Henry Fonda takes on The Wild Bunch, the same horse and rider go down twice: a white horse that rears then falls to its left, nearly on top of the rider.
When Jack Beauregard shoots Nobody's hat in the cemetery the second time, the bullet hole is barely visible. In the following scene it has gotten bigger and is clearly visible.
On some prints, usually the print shown on cable television, R.G. Armstrong is mistakenly listed in opening credits as "R.K. Armstrong."
As Nobody and Jack face off in the New Orleans street,a window air-conditioner (draped with canvas) and what looks like an electric window fan can be seen on the side of the "Hotel" in the background.
A New Orleans sidewalk sports a modern fire hydrant.
The steamboat "President" in the background near the end was built in 1924 and then known as "Cincinnati". She was not given her name until 1934, while the events in the movie take place in 1899.
In the opening scene where the Black minstrels are crossing the river in the background, they're in an aluminum boat that is painted brown.
As Nobody stands in the water waiting for a fish to take the bait, a cricket's on the water, but sounds more like a fly. A cricket never makes a buzzing noise, not even in water.
In Jack's first scene, he is told that his ship "sails the 21st." The telegram he receives in the saloon reminds him that the ship sails in 16 days, which makes that day the 5th of the month. In the subsequent cemetery scene, however, Jack gives the date as June 3, 1899.
When the wild bunch arrive in town after the street shootout, Sullivan should have been watching the fight he paid over $3000 for so should have alerted the wild bunch at that time that Beauregard was in town.