Gary O'Reilly

Corrected entry: For someone who needs a mask in order to breathe, Vader does a good job of screaming loudly while on the operating table.

Correction: As shown by the fact that he's still alive for what must be quite some time before Palpatine arrives to "rescue" him, it's pretty clear that he doesn't *need* the mask to breath, but it makes it far easier for him to do so. He can probably breath enough to scream while lying down, but a sith lord who can't really move about much isn't much good.

Gary O'Reilly