Slashdot reader and Motherboard writer dmoberhaus was the final participant in the world's first brain imaging study on salvinorin A , the psychoactive chemical in salvia divinorum. He wrote about what it's like to participate in a psychedelic drug trial , and why he volunteered to smoke the world's least favorite hallucinogen for science. Here's an excerpt from his report:In summary, Oberhaus said "the experience was quite pleasant." He added: "I only had a brief moment of panic when it seemed like one of the notes in the new age soundtrack had been held for far too long. I began to worry that time was dilating and that I might be trapped in this space for eternity. When the music progressed to the next note, however, the panic quickly subsided and time resumed its normal cadence."Oberhaus then took a higher dose the following day in an MRI machine. While the first dose of salvia in the machine didn't produce anything special, likely because it was a placebo, a very low dose, or that he had made some error during inhalation, the second dose in the machine resulted in a slightly less intense trip than the very first dose. "The reason, I think, was that the loud and persistent sounds of the MRI machine kept me tethered to the outside world and I was unable to fully immerse myself in the world that the salvia was generating," writes Oberhaus. "Still, I would describe it as a pleasant and visually striking experience."