Smoking/No Smoking

It won 1993 Cesar award. Those are two films. Smoking and No smoking. All characters played by two comedians. Set is meant to look like pictures used to teach English to French school-children. Both films start the same except in one she decide to quit smoking while in the other she chain smokes. Then what if... and it goes off with a whole different ending for I don't know how many times. Every time you'd think this is the end and then it explores a different possibility. One advise: don't rent both films the same day. Each lasts forever.