 It is sometimes accompanied by the tag "M. Chat" in small letters.A 2004 documentary, "Chats perchés" ("The Case of the Grinning Cat"), by film maker Chris Marker, used the phenomenon of M. Chat's appearance across France as a springboard for a reflection on the state of the country post-9/11.During a 2010 exhibition in Paris, Vuille claimed to have 60 cats across the French capital.