Here's why:
* No rhyme scheme: The poem does not follow a traditional rhyme scheme.
* No set meter: The poem doesn't adhere to a consistent metrical pattern.
* Free form: The poem is structured in short, fragmented lines, creating a sense of raw emotion and immediacy.
* Emphasis on rhythm and sound: While not adhering to traditional forms, the poem still employs rhythmic patterns and sound devices like alliteration and repetition to enhance its impact.
This makes "Hanging Fire" a perfect example of free verse poetry, which allows the poet greater freedom in expressing their thoughts and emotions.