Desc: ABBA: Bang a Boomerang: Directed by Matti Croker, Rebecca Mcelroy. With Alan Brough, Lasse Hallström, Barry Divola, Lynette Cameron. The inside story on the colossal crush that Australia had on Swedish super-group ABBA and their music in the 1970's, and how the unequalled and enduring fan worship changed both the group and Australia forever.