When saying or writing down your personal info.
I have never had that particular thing happen to me as far as dissociation with myself but i have had feelings like my head felt spacey and felt like i was out of my body looking in. Its called derealization. It comes from anxiety. I know it may sound weird but its amazing what our mind can do to us. Also with anxiety or body produces adrenaline like it would it we were attacked or pumped up by something. That also makes us feel funny. Hope that helps a little.