Walkabout movie

Walkabout is a 1971 film set in Australia, directed by Nicolas Roeg and starring Jenny Agutter, Luc Roeg (credited as Lucien John) and David Gulpilil. Edward Bond wrote the screenplay, which is loosely based on the novel Walkabout by James Vance Marshall.
A teenage schoolgirl (Jenny Agutter) and her much younger brother (Luc Roeg) become stranded in the wilderness after their father (John Meillon) goes berserk. After driving them far into the Australian outback for a picnic, the father suddenly begins shooting at his children. When
they run behind rocks for cover, he sets the car on fire and shoots himself in the head. The girl conceals what has happened from her brother and, after she has salvaged what food she can, the pair head out into the desert.

I like it , good movie.

Yes. I studied the underlying novel in English at high school. To walkabout basically means a male's [ususally] rite of passage in Aboriginal society to go by themselves into the wilderness. I imagine that American Indians would have something similar.