"Cheung smokes in a majority of her scenes and has snap-inhales, talk-exhales, nose exhales and light-ups. In one scene in a parking deck, Cheung takes about 5 drags, with some of the drags coming as she has not yet completed nose exhales. Obviously IRL. Haines has one drag and partially visible exhale. Dalle lights up, snaps and exhales in one scene, and then lights up again while driving a car."
Other references to this movie:
Maggie Cheung - Picture - dangling, Clean (2004), 1761k
Maggie Cheung - Picture - same, dangling unlit, Clean (2004), 10k
Maggie Cheung - Picture - holding, Clean (2004)
, Allposters.com