Goofs

First scene where Antonio Banderas drives his Jeep, however there aren't any keys in the ignition.

The vehicle Paul is driving at the beginning of the movie can be seen with no keys in the ignition and with keys in the ignition in several different positions at different times while he is driving.

After he broke the glass on the frame, it turns on the back mysteriously.

Although set in the United States, several cars are visible that were never sold there, such as the Ford Mondeo.

Paul hit the stroke on the typewriter 10 times instead of 9 while typing 'butterfly' near the end.

Nine letters plus a space makes ten.

Although the story takes place in Colorado, it's obvious the movie was filmed in a foreign country when the railroad locomotive appears.

Additionally, one of the highway signs is a foreign symbol.

The missing persons sheet for Michelle Emerson which the Deputy shows Paul reads "If you have seen this boy" even though they're looking for a 46 year old woman.

Nancy Barrows is cleaning up the picnic table as her son and husband toss the Frisbee. She tells her husband to "get the blanket" (which is on the table by the cooler she is holding). However, as she is walking off, the blanket is on top of the cooler in her arms.