Based on a novel by Matthew Quick, David O Russell has both written and directed this variation on the romantic comedy in which both main characters are deeply damaged and variably medicated.

Patrick used to be a teacher before he beat up a fellow teacher (he deserved it) and was diagnosed as bi-polar and confined to a mental institution for eight months. Tiffany used to be married to a cop who died in circumstances for which she feels blame and she has not been behaving as quietly and demurely as is expected of the newly bereaved. Both lead roles are played by attractive and talented young actors: Bradley Cooper ("The Hangover") and Jennifer Lawrence ("The Hunger Games") and, by the time I caught up with the movie on DVD, Lawrence had been awarded a deserved Academy Award for Best Actress for this quirky performance.

One of the distinctive features of this wonderful film is that most of the characters are obsessive to one extent and in one form or another, most notably Pat's father who is charmingly portrayed by veteran Robert de Niro. At turns funny and poignant, this is at heart a plea for us to be tolerant of others because - let's face it - we're all a little crazy.