Interesting topic. I have been sober for over 6 years, but I can say I do know what you are talking about. When I used to trip, I would try to smoke and I couldn't because it felt like I was pouring dirt down my throat. To me it was the truth being revealed, I was being shown what smoking really was, dirty and gross. I also learned that tripping wasn't for me, I would always end up thinking about what am I doing with my life etc. and getting freaked out about being a F---k up. But at that point it wasn't enough to keep me from doing it anyway. But back to the smoking, I always found that it was only on the way down that I really liked to puff. It was just too much to deal with while being spun out, I would always end up dropping bud or losing it. So I would just wait until later in the show or after, when I would need it most. I don't mess with any of that stuff anymore so I don't have to worry about it.