You board a plane and find out you're sitting next to a fat passenger that is clearly overflowing into your seat. There aren't too many options because the flight is full. Should you take your seat and bear it for the duration of the flight or would you ask to be rebooked on the next flight or would you demand that the fat passenger be rebooked on the next flight? It's a whole new flying experience out there and while I don't want to embarrass anyone, I don't wan to be uncomfortable either. It's hard trying to figure out what to do.