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Continuity mistake: Selvig is carefully moving a cylinder of iridium from a scale to its final location with a metal tongs. The way he holds the tongs changes, when it is highly unlikely that Selvig would change his grip while moving such a delicate substance. Most noticeable are his index and middle fingers. (01:01:20)

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Continuity mistake: During the battle of New York, Thor has just landed next to an upturned silver car. The rubble around the car changes/moves. The most noticeable is one wedged next to the front right wheel. The piece becomes much bigger in the next shot. (01:50:25)

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Visible crew/equipment: A reflector screen is visible on Hawkeye's sunglasses at the very end when Thor and a restrained Loki are returning, presumably, to Asgard. (02:06:10)

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Continuity mistake: Capt. America has just destroyed the first punching bag and walks away to pick up a new one. There are now 5 bags left. Note the chains belonging to the third one from the left. The way they lie on the floor differs in from shot to shot. (00:21:15 - 00:21:55)

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Continuity mistake: Sunlight is alternately on the top of Captain America's head or not when he tells the two policemen to get the civilians off the streets. (01:44:50)

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