Technically, you breathe out some oxygen as well as carbon dioxide, because your lungs can't process all of it. Thus, Conan could've been revived that way. Just something I learned in Science.
Oh...so there really is a page for that. *laughs at Mohorovicic's page* Bad Mohorovicic! You ate all the cookies! But I saved two for myself...MUAHAHAHAHAHAHAHAHAHAHAHA!!!!
Hmm, should I create one of those?