The prisoner is described as carrying an "Axis IV Dissociative Disorder." In psychiatric diagnosis, psychiatric disorders fall under Axis I, personality disorders and mental retardation fall under Axis II, medical disorders fall under Axis III, a general summary of psychosocial stressors (eg. health problems, money problems, or family problems, and rated as None, Mild, Moderate, or Severe) fall under Axis IV, and the patient's Global Assessment of Function score (GAF: 0 to 100) falls under Axis V. Dissociative Disorder is an Axis I diagnosis.
When Alice is first hit by the car, the car pulls her down, and you can see her start to go under the car. When Alice is hit from Ed's P.O.V., Alice hits the hood of the car, rolls over the top, then slides off the trunk onto the road.
When Paris is bending down picking up her items from the vending machine, her black underwear is clearly seen sticking above the back of her jeans. A few scenes later when she is closing the front door in the motel reception, her underwear is again visible and it has changed to white.
In the beginning sequence, Malcolm repeats a question in Spanish, "¿Cuál es la punta de vivir?" (What is the point of living?). Later, while taking pictures and explaining why he left the Police Department, he reiterates that question in Spanish as Ed, wording it a little differently - "¿QUÉ es la punta de vivir?" (emphasis added). Different words, both meaning "what" but used in different situations - "Cuál" would be the appropriate word in this question.
In the beginning sequence, Malcolm recites a poem that he made up, beginning with the first line, "As I was walking up the stair,..." Later, in the final lines of the movie, he reiterates this poem in a whisper as Timmy, wording the first line a little differently - "WHEN I was walking up the stairS..." (emphasis added).
The car used by the Nevada Department of Prisons had a blue license plate with white letters. These are actually personalized plates issued by the Nevada DMV. In Nevada, all state government owned vehicles have the standard license plate and they all have "EX" as the first two letters.
When Ed is in the room taking photos of the murdered man the angle changes and the wall extends beyond the crown molding; it goes up out of sight, more then ten feet. Even thought this is an old one story motel.
When the two convicts take control of the prisoner transport
car, the stunt driver (dressed in a light blue top, unlike the prison escort driver) can be clearly seen bringing the skidding car to a controlled stop.
After Maine is murdered, the remaining survivors are in room three discussing the situation, there's a clock on the bedside cabinet beside Ginny that reads 12.20. For the next several minutes (at least three minutes running time) that clock remains at 12.20.
Various inconsistencies, improbabilities and impossibilities in the motel scenes are not actual errors. This is all happening inside Malcolm's head, so the rules and geography of the real world don't necessarily apply.
At the end of the movie they are supposed to be in Frostproof, FL, but as the camera pans back there are mountains in the background of the orange grove. The shot looks a whole lot more like California, and not Florida. However, since this happens inside Malcolm's mind, the scenery does not need to be consistent with actual geography.