Have you ever had a daydream? If so, you’ve had a dissociative experience. The same is true if you’ve had an out-of-body moment or thought you were somewhere else as you drifted off to sleep. These are seemingly harmless and temporary dissociations. But further down the spectrum of such experiences, you find people actually traveling to a strange city and suddenly not remembering how they got there. You also find people with multiple personalities and other disordered thinking.In T...