On Friday I went to the pharmacy to pick up some medication. It was a long wait, and I wasn’t feeling well. Around me I heard people talking, phones ringing, and the various noises of the grocery store that houses the pharmacy. The sounds seemed to come from a distance, and I felt profoundly disconnected from everyone and everything around me, as if I was an observer in a dream that wasn’t mine. It wasn’t a particularly comfortable experience but it certainly wasn’t an unusual one. I have Dissociative Identity Disorder, and I’ve lived with chronic, severe dissociation nearly all my life. The episode I described illustrates the combined forces of depersonalization and derealization, two forms of dissociation that often appear together. And despite the fact that I have DID and my dissociative experiences, taken as a whole, are decidedly abnormal, dissociation itself is something just about everyone experiences from time to time.