Independence Day

Corrected entry: The planetary saucers in the movie are 15 miles in diameter, and are 2.5 miles in height. Assuming that 9/10 of the ships are air or lighter then air gases, and that the ships' walls are made of a metal with the density of water (this is a very generous estimate), then each ship would weigh 100 billion tons! No matter what source of flight used, these ships would create a pressure of 30 atmospheres on anything below it. Most buildings would crumble under 5 atmospheres, and our bodies would flatten like pancakes long before that.

Correction: You're assuming a closed system. If the air being compressed as the ship descends could not escape, then indeed the pressure would rise to 30 atm or whatever. But since there is no wall forcing the air to stay under the ship and get compressed, it can escape to the sides and up and therefore equalize the pressure.

Corrected entry: In the scene where Will Smith first notices the spacecraft, he is absolutely astounded by the sheer size of it. Yet his girlfriend, bringing him coffee, doesn't seem to notice it until she walks up to him and looks at his face to see what he is looking at. She didn't notice the 15 mile long UFO? It's not a really a mistake, just really crappy writing and acting.

Correction: Um, it took Will Smith several moments to notice the spaceship as well -- his attention is only drawn to it when the helicopter flies overhead. People simply do not go around looking up in the air as a matter of course.

Corrected entry: When Will Smith is trying to fly the craft, he pushes forward and the ship rams against the back wall. He then laughingly turns the "instruction sheet" taped in front of him upside down. This would also reverse left and right, as well as forward and backward.

Correction: He's not stupid. It's not like turning the paper sheet over will change the direction the controls move the craft. It's only to help him remember the whole forward-backward thing.

Corrected entry: If the alien is in a hard protective space suit, how can Will Smith knock him unconscious for so long by just punching him? Must have been quite a hard punch.

Correction: In the ancient world and middle ages sling shot was used to attack heavily armoured soldiers as a hit from a stone/bullet was likely to cause concussion, if a helmeted soldier was hit on the head. This may be the reason that an already concussed alien pilot was knocked out for so long. It could also be that Will gave the alien a good kicking on the way to Area 51!

Corrected entry: When in the area 51 base, a screen in the background shows a night vision view of a plane landing. Why is a Panavia Tornado fighter bomber landing in an American secret base, when they are flown in England, Germany and Italy?

Correction: Tornado's are kept in the US in squadron strength for training European pilots.

Corrected entry: When the President "fires" his Secretary of Defense, SecDef protests by saying "you can't do that!" He, in fact, is right. The SecDef would have to be impeached by Congress.

Correction: While the Senate must confirm Cabinet officials, they work for the the President directly. He can fire them at any time.

Corrected entry: As Will Smith's girlfriend walks out of the tunnel, there are two palm trees still standing. If the flame bursts flatten buildings, how could two palm trees avoid being flattened?

Correction: Palm trees can lie almost flat in high winds, buildings can't.

Corrected entry: The Secretary of Defense turns towards the President and gravely announces "We can expect the destruction of all major cities in 72 hours". Wow, I'm impressed. Either the US or Russia could accomplish that in less than half an hour. Incredibly advanced technology ain't what it used to be...

Correction: The point wasn't that the destruction of all major cities would take place in "only" 72 hours because of incredibly advanced technology. The point was that virtually nothing could be done to prevent further destruction and that the human race had only 72 hours left.

Corrected entry: In the mother ship Will and Jeff light up their two last cigars after transmitting the virus. On the ground contact is lost for "20 mins" - yet when they are picked up on the ground the cigars are still at full length and haven't burnt down a bit.

Correction: My father smokes that kind of cigar and I can tell you that they last at least 3 hours.

Corrected entry: The shape and size of the aliens isn't exactly humanoid, but, when Jeff and Will board the space ship the seats seem to be pretty well designed to accept a human body...

Correction: They'd taken the original seats out and redesigned it for humans.

Independence Day mistake picture

Visible crew/equipment: When Dr. Okun is about to unlock "the vault", and says, "The freak show," a crewmember wearing a black and white striped shirt is hiding under the vault's floor, right behind Okun. (Only visible on fullscreen DVD.)

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Russell Casse: Hello boys! I'm baaack!

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Trivia: According to the Director's commentary, Twentieth Century Fox Film Corporation did not want the film to be released under the title "Independence Day" to avoid legal complications (specifics weren't disclosed as to what the problems might be, but it's also why the abbreviation "ID4" was used). Roland Emmerich (director/writer) and Dean Devlin (writer) needed to justify the title, so they added the rousing bit right at the end of President Whitmore's speech at the hangar when he ends with, "The 4th of July will no longer be known as an American we celebrate our Independence Day!"

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