In Stranger Than Fiction, Will Ferrell finds his life controlled by a narrator he hears in his head. In the short film The Gunfighter, an Old West gunslinger also finds himself pursued by a voice (belonging to Parks & Rec's Nick Offerman). The bigger problem? Everyone else can hear it, too.
The Gunfighter was written by Kevin Tenglin and directed by Eric Kissack, and it's at once high-concept and delightfully filthy.