Vader's lung capacity
ok, i don't think this has been asked.. (if it has, i'm sorry, but don't worry i don't start topics often or even post much)
this may be explained in the novel, so maybe someone who's read it could clue us in...
but how does vader's lungs get messed up on mustafar?? AND if he did end up so he's not able to breath on his own.. then how the hell is he SCREAMING while he's on the operation table??