Rivette was unhappy with "La Religieuse" and re-evaluated his career, developing a unique cinematic style with "L'Amour fou". Influenced by the political turmoil of May 1968, improvisational theater and an in-depth interview with Jean Renoir, Rivette began working with large groups of actors on character development and allowing events to unfold on camera. This technique led to the thirteen-hour "Out 1". His films of the 1970s, such as "Celine and Julie Go Boating", often incorporated fantasy and were better-regarded. After attempting to make four consecutive films, however, Rivette had a nervous breakdown and his career slowed for several years, with films such as "Merry-Go-Round" and "Le Pont du Nord" being difficult productions.