Trivia: Walk the Line
- Actor Allusion: Waylon Jennings is played in the movie by his son, Shooter.
- Throw It In: In a scene portraying Cash under the influence of drugs, Phoenix grabbed hold of a sink and ripped it out of the wall. This action was not in the script.
- The line, "Fortunately, I keep my feathers numbered for just such an emergency" comes from the 1955 Foghorn Leghorn short All Fowled Up.