communtty?

i have been thinking a lot about the idea of community for a while. today, tina (my lovely wife) and i were talking about the different kinds of community. recently, because we are moving across country to take on a new ministry, we have been flying a great deal. one every fight, people have shared their life stories with us and others. what about a plane flight causes people to share so deeply? could it be the fact that you will never see the people again? could it be the possibility of a crash that moves us to share? what is it? it is something i will be pondering over the next few weeks - not trying to "find an answer" but to develop more questions.