I am watching this show right now on national geo channel. I knew these people existed, but wow they really are extreme. It would be cool to have one of these bunkers as a man cave but really to these levels? These people are worried about overpopulation or solar flares? If we get hit by a solar flare i would rather die then live underground with my inlaws for 3 years to come out to find no one. Overpopulation? What you cant move to somewhere else?