Of course, continuity gaffs are nothing new in film, and the mistakes seem to multiple along with the film’s budget. Sometimes these things just happen on a production his big, and I know from my own experience dabbling in filmmaking that mistakes are inevitable, it’s just how well you hide them.
Audio problem: When one of the computer operators resumed playing Galaga, the sound effect heard is for an enemy ship attempting to capture the player’s ship, but what’s shown on screen is normal gameplay.Revealing: Towards the beginning of the film Steve Rogers is working out his frustrations on a punching bag in a gym. He finally hits the bag so hard that it breaks open and flies against the wall. Watch the chain it was hanging from when he makes the final punch. Despite the force of the blow the chain connecting the bag to the ceiling stays completely motionless.
Factual error: The video game company NAMCO Bandai is misspelled twice as “NAMECO Bandai” in the end credits.
Continuity: After Iron Man takes out a worm “Jonah style”, he crashes into a cab and stop about two feet away. He gets up, there is a quick shot of him on the inside of his suit, and when he gets up, the cab is nowhere to be seen.
Continuity: Near the end of the big battle scene, Captain America is winged by a blaster bolt. When he is helped to his feet by Thor, he is holding his side, and there is visible damage to his uniform. In later shots, all evidence of being shot is gone from his uniform.
Continuity: Just after Dr. Banner asks Nick Fury how many spectrometers the Helicarrier has access to, he takes off his jacket, rolls it up, and puts it under his arm. In the next shot, the jacket is suddenly draped over his arm.
Continuity: In multiple shots where Iron Man is flying around the city, there are cuts on his forehead. However, when he is lying on the ground and Thor rips the face mask of his suit off, the cuts on his forehead have disappeared.
Continuity: When the vehicle bringing Captain America & Agent Coulson to the Helicarrier lands, in the wide shot, as the vehicle touches down, the wing tips fold downwards and inwards as if preparing for storage on board. But in the next shots outside the vehicle as Captain America disembarks, the wing tips are in their extended and locked flight position.
Factual error: In the scene in Stuttgart, we see a “reserved parking” sign written as “Reservierten Parken”. In correct German it would be written “Reservierter Parkplatz”.
Continuity: Throughout the film, Tony Stark’s chest ring can be seen glowing through his shirt except for two occasions when it’s suddenly off – after Loki escapes from the helicarrier, and when Loki and Tony Stark are talking in Stark tower.
Factual error: The Königsstraße in Stuttgart is located in the city’s main shopping area, not its cultural center as the film would suggest.
Continuity: When Captain America is punching the heavy bags and Fury first walks in, the bag that Captain America is punching (not the one he already broke) changes from not having duct tape around the middle, to having it, and then back.
Continuity: During the fight between Thor and the Hulk, Thor takes a hit to the face. He wipes his nose and gets blood on his finger. The next shot shows his face with a blood drop under the nose, he reaches for the hammer, and when the camera turns back to his face, the blood is smudged without him having moved.
Factual error: In Stuttgart, the German police cars use the wrong lights (they should be blue instead of orange-yellow) and license plate marking arrangements.
Audio problem: When Bruce Banner meets Natasha Romanoff for the first time in Calcutta, there’s a shot from behind her where Natasha is heard talking but her reflection in the small mirror behind Bruce isn’t.