Proteon has had the best guess, but only because we've talked about it before.
Suffice to say, it is the end all be all experience when performed correctly. Chadernook is right, if you don't do it correctly, you won't hit the threshold, but my oh my what a threshold it is.
I order some off the internet, right, I haven't tripped in a couple years and I was getting antsy. I ordered the plant itself, not the extract, but due to a shipping error I receive nothing but 5x extract (and the website claimed that their 5x is like 20x in your average head shop).
So I've got some buddies over and the tension is mounting (I had never done it before, and didn't know what to expect) so I say fuck it, I'm diving in. I put aprox three grams into a bong bowl (with screen) and fire up my butane lighter. I burn the bowl all in one toke, release the carb, and inhale the entire lot of it, holding it in as long as possible. This is pretty much the only way you'll get an experience similar to the one I shall describe for you now.
Tastes like ass. Kinda like burnt, alchoholic sage. About three second into me holding in the smoke, my friend asks, "You feel anthing yet?" In the time it take for him to complete that sentence, I start to see big swirling visuals. Not unlike strong, strong acid, until the swirls encompass more and more of my point of view and then I feel myself start to fall backwards.
I never feel myself hit the floor, or drop the bong, or anything. My falling backward, in my perceptions, has smeared the universe in front of my eyes into a thick color wash, and I am no longer in my house, sitting on my couch. Time is flying, but sitting still.
When I start to perceive images, it seems the world is made of triangles... all pieced together in some bizzarre cosmic puzzle. By this time, I have totally forgotten my identity, my name, where I am, what my environment should consist of, and what sort of being I am. All I know is what I see in front of me, and I seem to be stuck in a triangular prism of triangle upon triangle.
"Wow, if this is my existance, then this is going to be hard to break out of," I ponder to myself.
More and more the triangles are forming a tube, not unlike the tube in a cresting wave, swirling around a center point. I look hard into the center of that point and the very image of infinity strikes my being. "That's infinity, huh?" I think. That's all I can think, I am stunned by the beauty of it.
Suddenly it strikes me that maybe I can't get out... so I test my boundrys. In the real world, this was expressed by me trying to get up off the floor, but it didn't translate into that in my mind. It translated to the triangle shifting and pulsing as the colors behind them changed. I stammered to my feet, and thinking that standing up would break me out of the prism, I saw that it did not, so I screamed. Loud as fuck, primordial scream.
As an aside, my buddies had been watching me for all of 1 min 30 secs at this point, watching a glassy eyed Ish with no sign of being in his own head. I was gone. When I stood up to scream, one asked, "Are you okay?" and then I bellowed. Apparently I scared the shit outta him.
Right around that time it occured to me that I hadn't exhaled yet (I had, I had been breathing normally for two minutes, but I never told myself to exhale, so I though I hadn't) so I pushed air out of my lungs with gusto, sputtering and spitting.
Wondering around the living room, I still couldn't make sense of the whole situation, I couldn't fathom where I had just been, and who's house I was suddenly occupying. I sat down on the couch in bewilderment, and finally asked, "This is my house, right? This is my couch?" to which my stunned friends replied, "Um... yeah, that's your couch alright. You okay, man? Where the fuck did you go?"
The more questions they asked, the more grounded I became, and then I finally remembered my name. Ahh... that feels good, I know who I am now. Ahhhhhh.....
For about an hour I walked around my house with a pleasant smile and a cigarette. There is no better feeling than getting your memories and identity back after they have been ripped away, just knowing who I was was worth the extraordinary trip I just took.
I'll say this in closing, if you do this drug, remember to have someone with you who knows what to expect and won't ask worried questions - the Q&A session at the end made me lose the feeling I had while I was there. Every weed bowl thereafter, however, brought just a little bit of the trip back to my memory. Also, this plant is sacred. Don't do it on a whim, and don't do it "just for fun" like I did. It was cool that I got a life changing experience out of it, but it would have been nice to be seeking something of the sort.
Questions? Comments?