Poster for the film 'Microcosmos', 1996, tag line 'Withsnail and I'.

'Microcosmos' (original title Microcosmos : Le peuple de l'herbe — Microcosmos: People of the grass) is a 1996 documentary film by Claude Nuridsany and Marie Pérennou and produced by Jacques Perrin. Set to the music of Bruno Coulais, this film is primarily a record of detailed interactions between insects and other small invertebrates.

The advertising used puns on the titles of existing films, this one apeing 'Withnail and I'.