* There is such thing as dream sharing, right? (in the same lucid dream as another, even if they aren't lucid)

What if there was a huge dream sharing session? Like, an auditorium filled with people, and they all go to sleep and go LD, and they're all sharing the dream? Is it possible?

And what is dream sharing anyway? Is it really possible? 'Cause I mean, that'd be really.. strange.. unheardof... is it possible!? MY HEAD HURTS >.<