I, too, can feel the sensory overload at unexpected times. I avoid situations where I know it's likely to occur: parades, professional sporting events, malls at peak times, etc. But I have from time to time been taken by surprise. Funny thing is, one of my favorite places SHOULD cause overload in me: a country dance hall, packed with people, loud music, big screen music videos, lights, etc. I think I tolerate it b/c I chose to block out pretty much everything except the music. And I stand at the edge of the crowd, not in the midst of it.

I think your awareness and having a plan will take you a long way toward a healthy way of dealing with it!!