I agree with Moonsunn on the psychedelics helping to teach me that they're hallucinations and how to get out of a bad mindset. I used to see very religious things. pentagrams, angels and demons. Walls breathe, things appear to move, like what was already said.

I used to see shadow people that I would call "Observers" because they never interacted, they just watched me from a distance. All sizes, some stories tall.

I also have a rainbow static over my vision at most times. I had a hand on my left shoulder for about 6 years until I found the right medications. I don't condone anyone, especially people with mental illness, to use psychedelics.