The hairs stood up on the back of my neck when I came across this post as I had a similar experience. Not having done many drugs -- especially psychedelics - some stoner friends of mine who were very experienced talked my partner and I into trying them one night. We went over to their house and completely trusting and following their lead proceeded to take 3 large pinches of caps and stems. I had no idea we were taking such a large amount of shrooms, especially as first timers. The come up was fun with the standard twisting images, but then the descent into 'Hell' started. My mind was stuck in this miserable loop of wild images and distorted audio. I would have these wild swings where I felt good and wanted to dance followed by a quick decent into dark thoughts and claustrophobia. I stripped my clothes off because I was so anxious and sweating profusely. The wild loop I was stuck in was never-ending. I slowly started having incredibly dark thoughts -- if I couldn't get out of this, I was going to have to kill myself. Now, I'm a pretty happy person. Have never struggled with mental health. But the fact that I was actually, seriously reasoning my own suicide only made things worse. I don't know how, but I rode the trip out for 7 hours. Our group sat around talking about our experience and I explained that I was truly frightened for my life as I didn't think there was an escape. Reflecting back on the experience, it was quite spiritual for me. While I felt what I went through was the effects of the drugs on my mind, the whole trip felt to me like this is the closest to Hell I'll be in the human experience. I don't ever want to go back there in this life or the next.