September 10, 2006. Jeff Ingram wakes up on the sidewalk in front of the Denver World Trade Center. He's disoriented and disheveled. People avoid him. They assume he's drunk, homeless, or mentally disturbed. Jeff is none of those things -- but even he doesn't know who he is, or how he got here. He can't even recall his own name. What neither Jeff nor anybody else realizes is that he's suffering from a rare form of amnesia, called dissociative fugue. Affecting only 0.2% of the general population, people with this condition are unable to recall autobiographical information from some or all of their past life. It can last from days to years. Some sufferers never reclaim their memories.