I had one a while ago, 18 mg of 2C-B snorted.
Hurted like HELL at first, thought I was going to die (or more precisely, I wanted to so the mess in my head would calm down) and whatnot.
Then we went outside, sat on a bench and began to calm down.
At this moment I had a very special hallucination, like I was seeing "through" the illusion that is the world.
After that I became a bit crazy (?), I was convinced that I was God/Everything/Nothing (you see my point) and that I had recovered all my understanding of what was.
I remembered the initial spark of light, I remembered the Antiquity, I saw the mountains top and the labs where quantum physics are studied.
I saw humans trying to understand why they were here, to understand the world. I saw them finally realising WHY they were here, that they were all linked and that they were all one.
I saw how I/Everyone/Life worked, it was a perpetual mouvement of energy, constantly finding something new.
I drew into the feeling of friendship that I was sharing with my friends who were at my side, I really thought we were like at the after-party at the end of the universe, laughing about every small tricks we played to each other while we were "human", we told each other a lot of souvenirs, etc.
I saw how everything was equilibred, how evil balanced good.
I saw how the first spirit appeared into nothingness and had to start building up the first reasoning. How it had to first differ 0 and 1, what is and what isn't. Then think and create/discover the concept of time.
Then the spirit met a new one, and I saw them trying to communicate, trying to build something together, trying to build up trust while avoiding mistrust.
I saw that everything needs everything, as all is a question of perfect balance.
And everywhere I was looking, I saw a myriad of small "signs" that suddenly make sense as a constant reminder of all this knowledge, like hints Life/They/I had placed to tease me while I was in the "human" transition period.
The funny thing is that was I was going nuts like that, all my friends were only going through your regular trip, hallucinations but nothing more.
And EVERYTHING they said was making sense to me in the way of what I wrote 'till now, and I keep on laughing and making statements ("You say you'll come in a minute ? Haha, not like it matters eh ? After all, we have all the time in the world, plus an infinity of infinities") they just couldn't understand.
Was definately one of my most beautiful trip.