Let's see.....no cell phones, no fax machines; for that brief time there's nothing else going on in the world other than your dive and the bonus is that we get to see stuff that surface dwellers normally only see on TV. The added bonus is the camaraderie - we're all members of a relatively small club, interestingly no one seems to care what you do for a living, what kind of car you drive (as long it's big enough to haul your gear) or how big your TV is.