The "bump key" technique used by Russell Crowe's character does actually work as portrayed on older and cheaper (non-antibump) cylinder locks. However, the car lock tennis ball technique has been busted as a myth on MythBusters: Viewers' Special (2007)
Mark Isham, director Paul Haggis's regular collaborator, did not compose the score to this film, due to their falling out over Haggis's highly publicized decision to leave the Church of Scientology, of which Isham is still a member.
The actual place although never officially disclosed, where John is taking Lara and Luke is Venezuela. Correction: The destination, Caracas, can be seen on the airline ticket when John's father looks at them. The destination is disclosed when they are on the plane and you can hear an announcement on the PA: "Flight time to Caracas, Venezuela this evening is 5 hours and 32 minutes". Also, in the next scene John's father is shown clearly looking for Venezuela in a World Atlas.