The mads turn off the oxygen supply in the rest of the satellite, so no. ;)

Seriously though, I don't think I've ever walked out on a film. And I've seen some doozies. The sole exception was an auditorium that had some rough looking characters, who were already acting up during the previews. As I was the only other person in the theater, it seemed prudent to bail.

I would ask for a refund if I did walk because of a bad movie. I've noticed people seldom think they have the right to do so though.