Let's talk hallucinations in whump/general fiction.
So first off full disclosure, I have schizoaffective disorder - think some bits of bipolar and some bits of schizophrenia kind of squished together, and as such hallucinations are a BIG part of my general existence.
Definition: A hallucination is a perception of a sensory experience—such as sight, sound, smell, taste, or touch—that appears real but is created by the mind and lacks an external stimulus.
Now, I see a fair few "hallucinations" type prompts in whump events, and just generally within the whump community, and I see a LOT of auditory hallucinations type prompt fills - mainly in the form of malevolent whispers - and ye that's a thing, but there are so many other hallucinations.
The thing is hallucinations can effect literally any sense, not just hearing - though I will add that auditory is usually regarded as the most common.
this is a long post so I am going to put a cut here... below the cut is exploration of the tyoes of hallucination, the causes and a bit about insight.