I always get set off because of others reactions to me. I never even thought it might be because of some kind of sign I was giving off, that is interesting to think about, though. Gunna have to try to look for that in the future...

I think cocoabeans is probably right, and it may just be your perception. I know for a fact my perception of others emotions can be totally off at times.

For me, at least I'm part, I think my episodes arise from my lack of control in others responses to what I say/do, if that makes sense. I can't control the situation, but feel like I need to, and therefore lose it.