NP kathyanita.. me too.. I have ptsd from a tragic accident that left me disabled and from that tend to become dissociated (unreal...derealization) and also full blown flashbacks of the accident/thunderstorming etc...

But we all dissociate in life... it's a built in response, not just to trauma, but to boredom. Everyone experiences driving/going somewhere and realizing once there, they didn't see the surroundings along the way but was deep in thought.