people who are threatened with being swept away by a pathological rage may dream of a landslide or an avalanche, and there the unconscious uses an apt symbolic image to predict not an outer but an inner landslide, where the cultural behavior built up within the personality is completely covered up and swept away
Von Franz establishes the avalanche as the unconscious’s own preferred symbol for the catastrophic irruption of primitive, one-sided affect that obliterates the persona-structure and civilized ego.
, Shadow and Evil in Fairy Tales, 1974thesis