Desc: Take a Chance: Directed by Maria Thulin. With ABBA, Stig Anderson, Benny Andersson, Zoe Dronfield. Gert van der Graaf, an infamous stalker who reveals how his childhood crush on Abba superstar Agnetha Fältskog turned into an obsession that shaped the rest of his life, thus showing how compulsive fandom can become criminal obsession.