I've written this which works as an appendix to this thread.
My introduction to the spirit molecule
Roughly 8 years ago an associate of mine gave me a single dose of a substance, which I'd often read about, in herbal form and directed me to make a ritual out of smoking it. I was in a positive and curious frame of mind at the time, not suffering any emotional turmoil. I followed his guidance by heading to a small room where I had constructed a kind of altar out of miscellaneous junk, and sparked up.
Holding the smoke in for a few seconds I had an odd feeling in the pit of my stomach and immediately began to experience elaborate technicolour crystalline hallucinations. My altar seemed to take on a dramatic dimension and sense of meaning. I was aware that this was all the effect of the DMT I had just smoked, though, and decided to see what the world outside was like.
While walking round the block I became aware that reality as I'd been accustomed to seeing it was actually constructed from a series of 2-dimensional planes, like screens, that stood between me and something more mysterious. When I saw a girl's hair blowing in the wind it was quite clear to me that the movement was happening along one of these flat planes. Walking round a corner I felt it was the corner that was turning, as though I were crossing a revolving clock face beneath my feet. These strange impressions and effects were not frightening but very beautiful.
Five minutes later I was back in familiar reality aware that I'd experienced a rare and seemingly profound perception that I could recall in some detail. It may be that there had been some subconscious perceptions made that would remain with me after the immediate effect had worn off - I wouldn't be surprised if this were the case.
It's worth adding that the effect can be very different depending on subject, setting, occasion etc. DMT is not a recreational drug and I've since been wary of taking it if I didn't feel relaxed, confident and "prepared". The experience was certainly unlike any I've had using any other substance. Don't expect a life-transforming shamanic epiphany either - but on the other hand I wouldn't rule it out