Other mistake: When they're roping the mustangs, the "stallion" doesn't have the genitals of a stallion.
The Misfits (1961)
1 mistake
Directed by: John Huston
Starring: Clark Gable, Marilyn Monroe, Montgomery Clift, Thelma Ritter
Perce: So what I want to know... what I want to know is: who do you depend on?
Roslyn: I don't know. Maybe all there really is is just the next thing. The next thing that happens. Maybe you're not supposed to remember anybody's promises.