The Day the Earth Stood Still (2008)

Factual error: The electrical power grid fails, depicted by a series of shots of city blackouts and equipment shutdowns. When the power goes out, the lights of an oil refinery go out as well as the flare. In actuality the exact opposite happens to a flare when powered equipment such as compressors and cooling devices fail simultaneously. The flare is not an electrically powered device and is designed to stay lit during power outages. All excess pressure is immediately vented to the flare stack within a second, causing an enormous flame and smoke cloud that will be visible for several miles.

Continuity mistake: When the scientists are walking through the fog towards the sphere shortly after it has landed in Central Park, we see them walk through many lines of trees before reaching the sphere. Camera cuts to a different angle, when the fog has all cleared and we briefly see behind the scientists and it only shows one line of small trees quite a bit away, not the lines of trees they were walking through before.

Factual error: As Klaatu is walking down the train platform at Newark Penn Station, in the background you can see signs that say "VIA". VIA is the national railway of Canada and does not have a presence in New Jersey. This scene was filmed in Canada, as evidenced by the signs on the platform and the 1950s style streamlined passenger cars on the track. Neither Amtrak nor NJ Transit uses those type of cars in their trains.

Trivia: When Klaatu is shown on the tv as an escaped convict, the phone number shown to call to report him is not the usual 1-800-555 number, rather it is 1-800-472-0391 which is the Alaska Weather Information Hotline.

Klaatu: If the Earth dies, you die. If the human race dies, the Earth survives.

Polygraph Operator: I'm going to ask you a series of control questions. Are you currently in a seated position?
Klaatu: Yes.
Polygraph Operator: Are you human?
Klaatu: My body is.
Polygraph Operator: Do you feel pain?
Klaatu: My body does.
Polygraph Operator: Are you aware of an impending attack on the planet earth?
Klaatu: You should let me go.

Klaatu: There are some things I can't do.
Jacob Benson: But you have powers.
Klaatu: I'm sorry.
Jacob Benson: Please. Please!
Klaatu: Jacob, nothing ever truly dies. The universe wastes nothing. Everything is simply, transformed.
Jacob Benson: Just leave me alone.

Question: Is Mr. Wu's grandson an alien like him? When Helen asks him if he's one of them, his response seems to suggest that he's dodging the question.

Question: If Klaatu chooses to save the policeman that he injures/kills, and seemingly has the power to do this as many times as he wishes, why does he let the man using the Polygraph die?

Question: When Klaatu and Professor Barnhardt are writing on the black board together, are they solving something that we just haven't solved yet, and so answering this question is hopeless, or does anybody know what it is they are supposedly solving, it looks to be something to do with an event horizon.