Trivia

The film had 43 shots that involved computer generated effects.

The film had a 1/32 shooting ratio (for every minute of footage used, 32 minutes were unused).

The film had a 13 day shooting schedule.

Not a single light was used in the film. All light was from practical sources on and around the sets and locations.

As the film was shot in Austin, Texas in the middle of August, all the "cold" scenes involving snow had to be faked in post. The "coldest" scene's ambient temperature was actually around 102 degrees Fahrenheit during filming.