We’ve all had that moment. The moment where you might see or hear something and you wonder: am I going crazy? In this hour, TED speakers share their experiences straddling that line between madness and sanity -- and question if we’re all in the gray area between the two.

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Tags:  TED radio hour,  Psychoanalysis,  Charles Bonnet syndrome,  hallucinations,  neurology,  Oliver Sacks,  Elyn Saks,  schizophrenia,  mental illness,  bipolar disorder,  spoken word performers,  mental health,  Joshua Walters,  Jon Ronson,  psychopaths,  madness