
In Oliver Stone's 1991 movie The Doors, the band staple Light My Fire was seemingly written very, very quickly.
As Rick Beato accurately describes the scene, “You [referring to Robby Krieger character] pull out a handwritten piece of paper with lyrics on it, and you start playing A minor, F sharp minor, and you sing your melody, and then the Jim Morrison character comes out, and he's like, ‘Yeah, that's good. And they start singing along.’”