Wow wow wow...
Who was it said "you better keep your mouth shut and appear stupid rather than open it and remove all doubt".
The levels of green lack of knowledge and understanding in some of the above comments are astonishing. I'd rather do a rapid descent all alone by myself any day than have one like these sitting next to me attempting to help.
If these are cathay pilots, it truly shows the scary low levels of knowledge and experience present on cathay flight decks today.