where they're in a plane/flying ship thing, not a sailing ship but like a kind of star wars ship but not star wars, and it's flying over a desert, and there's three people living in caves that eat humans. and they're really gross, and the main characters get captured by them at some point.
something about prisoners taking over the ship/plane thing, possibly with nicholas cage in it with long hair?!
thanks, it's doing my nut.