So far this is the best explanation I've heard trying to explain that mental place you go to. Please repost if you'd like.
Story of Jason by Sergeant Kevin Briggs:
After about an hour of speaking with Jason, he asked us if we knew the story of Pandora's box. Recalling your Greek mythology, Zeus created Pandora, and sent her down to Earth with a box, and told her, "Never, ever open that box." Well one day, curiosity got the better of Pandora, and she did open the box. Out flew plagues, sorrows, and all sorts of evils against man. The only good thing in the box was hope. Jason then asked us, "What happens when you open the box and hope isn't there?" He paused a few moments, leaned to his right, and was gone. This kind, intelligent young man from New Jersey had just committed suicide.
( Kevin Briggs: The bridge between suicide and life