talking about the fear, natch.
Gotta say, my ole man knows how to make a potent pot brownie.
I've felt it a bunch of times, but I've worked through it with meditation (without drugs)...
I think psychedelics just bring out deeper parts of the mind. I don't do them anymore, but I used to, so I have some experience. I'm not a teetotaler, I still drink alcohol and smoke weed sometimes, but I'm done with psychedelics for the time being.
Before I knew what it was, if I had an episode of "harm OCD", I would sometimes feel physically ill and excuse myself to the bathroom and repeatedly splash water on my face until the feeling went away. Sometimes I'd keep my hands behind my back on purpose (the idea being that I would harm someone with my hands).
Since learning what it is, I'm more easily able to dispel it when it arises. Simply knowing "oh, this is OCD" is powerful enough for me to get on with my life. For the record, I completely abstain from psychedelics or any recreational drugs now (with the exception of coffee, and light alcohol at social gatherings).
My first trip was an incredible experience, I couldn't wait for my next chance to trip. Unfortunately, my second trip went south very fast; I became very anxious and I started having fears that I would unreasonably kill myself or murder my friend. What I didn't know at the time was that I suffered from "Harm OCD" and that the psychedelics were magnifying my OCD tenfold, and thus triggered a horrendous panic attack that wouldn't end until the effects of the drugs wore off.