Factual error: The evil man request 10,000 pieces of gold for ransom. Each gold piece looks to be about 10 ounces, and 10,000 of those would make the entire thing of gold weigh about or over 3 tons and 2 guys are carrying it around in a little chest throughout the movie.

Continuity: When Jackie goes into the tent (at the coal mine) to talk to the Princess, it is broad day-light. When he comes out (three minutes later) it is pitch black out side.

Revealing: This mistake occurs in the beginning of the film where the bandits rob the train. When Jackie is standing on the coal (or was it wood?) car you can see the train is passing a modern sign (you can see it on the right).

Continuity: In the scene in the desert when Roy is buried alive, Jackie walks up and casts a shadow over his face.  In the next camera shot, the shadow is facing a different direction. It continually changes throughout this scene.

Continuity: Jackie Chan fights the Indians in the stream. His clothes are soaked. But as soon as he is on the land to fight the others, his clothes are dry.

Visible crew/equipment: When they are breaking out of the jail cell, when he opens the door, there is a person that holds the door open.

Continuity: At the end of the hanging scene when the horses and wagon charge the gallows, the wagon hits the structure, the sheriff falls, you can see the horse break free from the wagon, leaving it under the fallen gallows. The next scene the horses are back attached to the wagon again.

Continuity: Near the beginning of the film, when the three volunteers are kneeling and Jackie Chan comes up behind them, he also kneels down at a considerable distance behind them.   The camera cuts to a different shot, then immediately back to the Imperial Guards, and now Chan is directly behind them.

Continuity: When the camera is under the train in the beginning of the film you see only one carriage/wagon pass over the camera, but in fact it should be a train with several wagons.

Continuity: At the end of the hanging scene, Roy O'Bannon's rope that he is being hung from is seen to be cut, but in the next camera shot you see the Indian girl shoot the rope and cut it.

Continuity: when trying to escape from Roy's 'hideout', Roy doesn't have his hat with him. Later when he saves Chon in the Chinese encampment he has it. In this scene he says that he followed Chon so he wouldn't have had time to return for the hat. Also, returning to somewhere that he is well-known for frequenting would have been foolish considering there would probably be quite a few people out looking for then as they had just escaped being hung.

Factual error: Just before we see Roy O'Bannon's gang for the first time as they are preparing to rob a train, we see a shot of the train winding along track in a very picturesque valley.   However, the tracks are paralleled by very modern telephone poles with several wires on them.  If this was truly the old west, the poles would have had only a single wire on them for the telegraph service.

Continuity: At the last part of the hanging scene when Roy falls into his casket, you can see that his hands aren't tied together when he falls in.  But in the next shot, he's on his back with his hands still tied.

Revealing: At the end, when Jackie is fighting the bad guy, he jumps up into a windowsill and then jumps down when the bad guy tries to hit him with a spear. If you look at the spear when it hits the wall, you can see that the spearhead is made of rubber because it bends when it touches the wall.

Continuity: When Chan is planning to leave Roy and go it alone, he takes his hat off of his horse. The camera cuts to a shot from behind Chan, and the hat is now hanging behind his neck.

Visible crew/equipment: During Chon Wang's battle at the bell tower, he is hanging onto a board in one shot, and you can see a large net under him, in case Jackie Chan (who played Chon) fell.

Continuity: In the scene where Chon and Roy are on the gallows about to be hanged, there is a series of quick switches between shots of the gallows and shots of the girl's hands as she loads a rifle, cocks it, and raises the sight to take aim. However, those three shots (muzzle, cocking mechanism, and sight) are of three different firearms; none of which are the one she is eventually seen firing at the gallows.

Continuity: When Jackie is fighting the bad guy at end at the top of the of bell tower, the bad guy bends his sword very badly.  When they fall to the bottom and the bad guy picks his sword back up, it is perfectly straight again.

Continuity: When Chon attacks Roy for touching his ponytail, he has a cowboy hat on. During the attack, Chon's head goes out of sight for a second and then comes back in but his hat has disappeared. Also, right after that Chon says, "Never touch my cue," and he pulls his hat out of nowhere.

Continuity: When the hangman puts the noose over Roy's head, he places the knot on Roy's shoulder so it hangs down the front of his body, as does Chon's. The camera then cuts to a wide shot of the gallows and the knots on both Roy's and Chon's nooses are suddenly hanging down their backs.