The dramatic explosion at the start of the film was captured using 135 synchronized still cameras.
Thomas Jefferson did NOT shoot a man on the White house lawn for treason. This movie is the source of that rumor.
Vinnie Jones was going to do a stunt, but John Travolta stopped him, and a stuntman did it instead. The wire broke, and the stuntman fell sixty to seventy feet onto a concrete floor, breaking his spine.
Halle Berry agreed to the topless scene because she wanted to overcome her fear of doing nude scenes. An alternate version was also shot with her wearing a bikini top.
When Stanley and Agent Roberts are reviewing their past dealings, Roberts accuses Stanley of hacking into the U.S. government's Carnivore system, and Stanley claims he did it because the government was illegally spying on U.S. citizens' e-mails. This plot line was likely considered a far-fetched notion to viewers of a movie that was released three months before the September 11, 2001 attacks, and more than a year before real-life government spying, of the kind described in the movie, was exposed.