halucinations without using substances?

[Thirdeyerelativity]

I have had one experience of tripping without the use of a psych.

 

[bluesky]

I recognise this as well, especially the sleep related hallucinations. Although I had it to some extent even before my first tripp it seems to happen more often after I first took psychedelics. From what I've been reading there are two types of hallucinations one can get close to sleep: hypnogogic hallucinations when falling asleep and hypnopompic hallucinations when waking up. For me the hypnogogic ones have a lot in common with psychedelic CEV while the hypnopompic are extremely terrifying, for example I have experienced being dragged by a demon across my bed, not fun!

 

[SKA]

My most potent sober CEVs have always happened at the threshold of sleep and waking, very tryptamine-like in some cases. This had made it easy for me to believe that we produce the stuff in our brains.

Salvador Dali used to take micro-short naps in an armchair. He'd drape his arm over the arm of the chair while holding a heavy key between his thumb and fingertip. Upon snoozing, he would drop the key and awaken immediately. Alternately, he'd hold a spoon over a dish and the clank would wake him. These micro naps were the source of much of his visual inspiration.

Yes! This I have once come across many years ago. This is just one of his Methods. He had a sort of guide to lucid dreaming, specifically for falling asleep whilst remaining conscious.
It was named something like "Dalí's 50 methods of....." I can't remember the name, but I do remember reading an excerpt of it on the internet once.

In this guide Dalí had 50 methods/tips for falling asleep "without falling asleep"
One of them was, as you said, with the spoon held over the silver plate. But there were
more. Many of them described actions of falling asleep while staying awake that were seemingly impossible & paradoxical. I found it very inspiring, but never found the full guide/book on the internet. Just that excerpt.

Such an elusive, little known work of Dalí.
Does anyone know this book/giude? And where to find it? Either PDF or book?