Continuity mistake: When Bond escapes from the train and drives away the number and position of the bullet holes changes between shots.
Revealing mistake: When Bond is driving on two wheels, the stuntman behind the wheel is very noticeable, mainly because of his toupee.
Revealing mistake: When Bond horseback rides towards the plane, Roger Moore is replaced by an obvious stunt man wearing red goggles. (02:02:50)
Continuity mistake: Grishcka holds the lower tip of the diamond but a shot later the diamond is tucked inside his hand. (01:31:00)
Revealing mistake: On top of the plane, Gobinda's stunt is noticeable because he has less of a beard.
Revealing mistake: When Grischka pins Bond to the cabin door with his knives, he takes out a knife and attempts to kill Bond for killing his twin brother. Bond then opens the cabin door and then kills Grischka by opening the cabin door and throwing a knife into his stomach. If you watch carefully, you can see the cabin door begin to open before Bond pulls the cabin handle down.
Continuity mistake: During the pre-credits sequence, Bond pulls the ripcords on the parachutes of the two guards who are in the truck with him and the guard on the right is holding a rifle in his right hand, but when he is flying in the air in the next shot, the rifle has gone.
Continuity mistake: When Bond is fighting Gobinda on the roof of the train carriage, Grischka appears and you can see from behind he puts his left hand on the roof, but when the camera angle changes in the next shot, Grischka now has his right hand on the roof.
Factual error: When Bond is fighting with Glenda on the wagon roof, shortly before passing a tunnel, which is supposed to be already in West Germany, a communist slogan is visible on the tunnel entry, stating 'Our contribution to a positive balance: daily fulfillment of the plan'. Not something that would be on the west side.
Continuity mistake: Bond arrives in West Berlin to travel to Karl-Marx-Stadt. The Mercedes stops just before Checkpoint Charlie and the other guy gets out of the car. One can see the license plate - which appears to be genuine German (DIN font and spacing etc). When the "same" car later arrives at the Circus the plates are obviously props. The font is off and the plates are obviously fake.
Continuity mistake: When Bond is beside the train going through the station there is nothing on the left, but as the train leaves a platform has appeared, and an engine shed and a brick bridge This was filmed back at the main station because of the double track set up.
Continuity mistake: When the train passes the signal box and the points get changed you can see the train in in the background and it is halfway past the station. When the Mercedes passes the train, it's still halfway past the station, and when the Mercedes catches it up again it's no further along. The train is moving at a constant speed the whole time.
Visible crew/equipment: When General Orloff first catches the train up, the reflection of the camara helicopter can be seen in the car's windows.
Revealing mistake: When Bond exits the carriage at the tunnel, it's an obvious stunt double.
Audio problem: When the circus train pulls out of the station just after Bond has the shoot out in the tunnel we hear the sound of a steam train pulling away with wheel slip, but the wheels are not slipping at all.
Continuity mistake: When Bond asks for the jet's tank to be filled, his cockpit swaps from closed to open between shots.
Continuity mistake: While with Q, Bond rolls-up his sleeve to show his watch. In the close-up the shirt is further down.
Continuity mistake: When Bond approaches a gas station with the jet, in the close-up of Bond's face the background changes (cars and buildings disappear).
Continuity mistake: When Bond is about to fly through the second door of the hangar there are no soldiers holding it. A shot later a bunch of them have suddenly appeared.
Continuity mistake: When Bond is about to fly through the hangar, the soldiers are running away. In the immediate next angle they're standing still and the colonel is commanding them to run.
Chosen answer: The satisfaction of knowing he'll win, the thrill of pulling one over on someone; maybe like Goldfinger, he just doesn't like to lose under any circumstances.
Captain Defenestrator