I'll speak from personal experience. I had heard about DMT 3 years before I would end up trying it for the first time. I had done much research, and had been completely excited and ambitious to be able to finally try it. When it was finally in my hands, I thought to myself, "do I really want to do this?" I was incredibly nervous. After all that time being so excited, I wasn't really sure what to do cause I was so nervous. Well suffice to say, I loaded up the bong, and had myself the best experience of my life up until that point. I remember remarking that the pleasure felt like what an MDMA peak felt like times ten.
As Sykosis mentioned, it really doesn't necessarily go away. The last time I smoked DMT, my heart was beating a mile a minute, I was sweating, fatigued and a bit queasy...and it went marvelously. It's just something you have to push through. I wouldn't really say it's a very good indicator of how things will go.
"Science without religion is lame. Religion without science is blind" - Albert Einstein
"The Mighty One appears, the horizon shines. Atum appears on the smell of his censing, the Sunshine- god has risen in the sky, the Mansion of the pyramidion is in joy and all its inmates are assembled, a voice calls out within the shrine, shouting reverberates around the Netherworld." - Egyptian Book of the Dead
"Man fears time, but time fears the Pyramids" - 9th century Arab proverb