I had an LSD trip several years ago where this was the main focus of most of my trip. I kept wanting to speek, but would get stuck asking myself "Why am I going to say this?". I would have been upset if one of the others I was with started babbling and wouldn't stop. Which ended up happening, and the other two of us had to tell him to just relax and let the silence continue on. We tend to stick to complete silence and darkness when we do these sessions and I personally believe I gain most when my trips are kept silent. I have since that last experience been much less eager to speak out during debates amongst those around me and have attempted to stay away from engaging in meaningless conversations. I haven't been completely successful, but I am making progress with this. I find the topic to be fascinating, and do think a lot of people would benefit from having this particular type of trip.