These scores break the boundary of traditional musical notation, using more expressive or interpretive notation to convey the gist of a sound. Indeed, like how it is nearly impossible to convey certain scenes or moods through text, it is nearly impossible to convey certain ways of performing music through standard notation. Thus, I would say that it is not uncommon for scorewriters to be inventive with notation.

Éric Normand did something comparable for his piece, sur la glace / on ice, that caught my attention.