van conversation

so, what do you talk about with 4 other people in a van that you have never really "met" and have no "real" history with? As I wait to board my plane I ponder this and instead of coming up with real topics of conversation, I find myself doing what I often find myself doing ....considering the worst. What would make for the worst possible dialogues in a mildly stinky van? How do these sound...
So, do you guys like to run? Or how about discussing what people usually say they hate about me, would that make for comforable conversation? Or maybe talking about an exotic rash the last people who used this rental had? How about insisting on total silence to prepare our minds and spirit? Perhaps its best if I spent my plane rides coming up with something better :) almost time to run!