As someone who had psychedelic experiences, I thought they'd be like that.
In the few hours I experienced hallucinations after not sleeping for ~7 days, I also heard a radio playing faintly in the background. "Faintly" doesn't do it justice because it was very much undeniably audibly there, even if I knew it wasn't.
I also heard footsteps, felt their vibrations, heard and felt stuff on shelves shake in response to the stepping. It was stunning how in concert and real it was. It was like it was more real than reality itself.
I was aware it wasn't real which made it fucking terrifying, but it was both beautiful and absolutely fascinating at the same time. I was both in awe and horrified that it could be permanent.
Brains are crazy stuff and I can see just how easily someone can become delusional based on what is very much factual in their own experience of reality. There literally is no boundary between reality and true hallucinations, which is a terrifying prospect and
It was an eye-opener when I finally realized the faint FM radio sounds I kept hearing in the middle of the night were actually manic hallucinations.