* ActorAllusion: Music/WaylonJennings is played in the movie by his son, Shooter.
* ThrowItIn: 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 WesternAnimation/FoghornLeghorn short ''All Fowled Up.''