Continuity mistake: Speed and Poe crash the fancy party to set up the bet for 3 grands. James Coburn chews up a toast (and the scenery) saying he'll take Chick Gandil's odds. He chewed the toast whole, but at the next cut the toast reappears in his other hand, previously free. (00:43:35)
Continuity mistake: Chaney beats up the gangster who attacks him in the bar brawl and sends him over the pool table - he does it twice with different timings in two separate shots. (00:37:45)
Revealing mistake: Establishing shots of the party where Chaney will fight Pettibon's guy; when we see the band play and people dance, the footage is rather obviously stopped and reversed to give the impression of a longer shot (evidently they had too little usable film of the crowd dancing). (00:31:00)
Continuity mistake: Speed arranges on the phone Chaney's first fight in New Orleans against Mr. Pettibon's man. The people you see walking through the doors of the barbershop never carry over from one shot to the next. (00:30:00)
Continuity mistake: When Chaney gets his cup of coffee at the diner where he spots Lucy Simpson for the first time, the cup turns on its own between shots, as shown by the position of its handle The cup faces away from him again at the end of the sequence when he decides to go be a manly man and molest her. (00:14:50)
Factual error: In the establishing shot of the street where Chaney rents in 1930s New Orleans, you can see the sign for Angel Sheet Metal Works, which was created in 1968. (00:13:15)
Continuity mistake: When Chuck is taking a beating after failing to corner his opponent, look at the guy in a red tie cheering by them; out of nowhere has a cigarette pops in his mouth, he chews it with a De Niro-esque underbite, and it disappears suddenly at the cut. (00:06:35)
Continuity mistake: When Chaney says momentarily goodbye to Speed Weed and Gayleen Schoonover at the New Orleans station, the passengers walking off the train and behind Bronson change with no consistency between shot and reverse angle. (00:12:25)
Continuity mistake: At the 'champagne breakfast', Lucy asks Chaney how does he "make money." Her purse's handle is up, then down. It happens again in the same scene when Chaney makes the joke about him "feeling better" than the other guy when he is not the one getting KOd. (00:00:42)
Factual error: When Chaney shoots towards the bar counter, the bar sports a calendar that shows exactly 29 days in the month. The only possible month with 29 days the first being on a Sunday would be February of the leap year 1930, but the movie is set post-prohibition. The scene is not set in February anyway - minutes later they show up at Lucy's home at 5 am and the sun shines.
Continuity mistake: During the bar fight, the balls change position on the billiard table multiple times depending on the camera angle. (00:00:37)
Continuity mistake: Wisely Chaney points out that two years in medical school don't make a doctor. James Coburn's hands are out of his pockets in one shot, and abruptly inside the pockets at the cut. (00:24:55)
Continuity mistake: Speed goes fetch his friend Poe in the Pentecostal church, and the two walk down the road of the cemetery. Time certainly passed between takes, as shown by the shadows of the tombs, which change greatly in the length. (00:24:20)
Continuity mistake: When Jim Henry mockingly urges the resident samaritans of the dock to 'help the kid up', said kid gets up on his own sporting a bloody lip and nose. Just in that close-up though; he steps in to keep fighting and gets whooped, but his face is clean throughout it. He only gets bloodied again when the dude begins to swing his head at him with the strangest headbutting ever. (00:21:50)
Continuity mistake: Speed is on the balcony when he hears someone ringing downstairs. You can see on the table a packet of smokes and matches. Speed then tosses the newspaper on the table, gets the door, and when he returns to the balcony with Chaney those objects change position. (00:17:05)
Continuity mistake: In a hint to his gambling habits, we see Speed at home marking on the newspaper some of the races. He is wearing a shirt. Cut, and he's sitting in his tank top, the shirt is on the back of the chair. (00:17:00)
Continuity mistake: When Chaney walks up to the stranger at the diner's, Jill Ireland 's pose as well as the bartender's change entirely at the cut where Bronson is moving along the counter. (00:15:00)
Audio problem: After the flawless victory, Chaney and Speed head via train to Speed's home turf, New Orleans. The name of the city though is dubbed in a pause of the dialogue by a voice that does not even sound like James Coburn's while he opens his suitcase. You can even see that his tongue and mouth don't move to articulate the word. (00:11:35)
Continuity mistake: Chaney wraps his first fight up very quickly. As he does, the jacket in James Coburn's arms changes position between shots. (00:10:45)
Continuity mistake: The not-so-friendly waitress tells Chaney he has to pay a nickel for his third refill of coffee. During this bit, the newspaper on the counter keeps changing position between shots; open, folded one way, folded facing the opposite direction. (00:03:45)