I smoked quite a bit through highschool, and it made my SA so much worse. One summer I lived out in the country but worked, so almost every night I would smoke. I had very little social interaction that whole summer, and it messed me right up. I thought the whole world was out to get me.
However, I loved sitting there watching TV and linking things together. It's hard to describe, but I would link things together, like this happens because of that, and this because of that, and so on till I had this big chain in my head, then I would forget it all when I saw something new hehe.
The thing that scares me the most with SA is how my voice sounds, and weed amplifiies your effects, so whenever I was stoned I would completely shut up.