Factual error: Considering the explosion's force vector, I am at a loss to explain the flying cars. The cars should have been pushed sideways. Inertia of the cars is another problem. Explosions occur in very short time intervals. So, the force needed to overcome a car's inertia and accelerate it into the air would be extremely large. Unfortunately, car bodies aren't designed for such forces. A violent explosion would hit a stationary car like a speeding bus. The car would be demolished, not thrown in the air. Bad physics! (00:07:20)
Factual error: When the copter is getting ready to lift the bus, there is a shot where you can clearly see high-tension electrical wires and a tower behind the parade of vehicles. The wires path must have crossed the roadway the bus etc. were on just moments before. How then, did the copter remain cabled to the bus?
Factual error: In the bank, when Halle Berry is about to be hanged, we see Hugh Jackman typing on a computer to get the money back. In one shot of the screen, we see a world map with some names countries and their capitals. On this map, Colombia is misspelled as Columbia; and the city of Bogota appears to be in the wrong place.
Factual error: Jackman's character states that he will hack into the government's network using an old PDP-10. The command line interface for a PDP-10 should be shown on the monitors. None of the shots of the monitors in the movie show a PDP-10 command line.
Factual error: Early in the film they cut to a scene with the title Washington D. C. and you can see in a long shot the very distinctive building "The Bonaventure Hotel" which is in downtown Los Angeles. This building is one of a kind and there are no buildings like this in Washington DC. Also the buildings in the long shots of this scene are high rises. So even if you don't know the uniqueness of the hotel a lot of people do know that Washington DC does not have such tall buildings because of height restrictions.
Factual error: Some of the IP address listed during his cyber hack are not real IP address (ie. 293.*.*.*) The highest possible number is 255. This was done for the same reason that movies use 555- for phone numbers: to prevent enthusiastic moviegoers from actually reaching any real person or entity.