Continuity mistake: The silver SUV in which John, Laura and their son are escaping, changes several times from one to two inspection decals on its windshield. Firstly there are two decals reading 9_10. Right after Laura tries to step out of the running car and they almost collide with a truck, the SUV comes to a full stop and there is a single decal reading 5_10. When they are at the checkpoint leaving Pennsylvania we go again to two decals. Additionally, when two decals are present, they sometimes read 9_10 and some other times 11_10. (01:38:00 - 01:43:20)
The Next Three Days (2010)
1 continuity mistake - chronological order
Directed by: Paul Haggis
Starring: Liam Neeson, Elizabeth Banks, Russell Crowe
Other mistake: Lara's hair is plain and pulled back in a pony tail when she first escapes. Within a short period of time, her hair becomes nicely styled but she would have needed a fair amount of time with a curling iron, hairspray, etc., for it to look so nice.
Damon Pennington: No prison in the world is airtight.
Answer: He read their airline tickets and probably the plan for their final destination is packed together with it.