Sorry to be that annoying Redditor that answers a question with an answer that in fact does not answer the question, but Go sleep hallucinations! You got me. I discovered who exactly you are. Yes, now I know you're an actual real, even googleable thing, so now will you please leave me?

(For those whom this will bring major validation to, these hallucinations are called hypnogogic hallucinations - if upon falling asleep - and hypnopompic hallucinations if while waking up.)