District 9 (2009)
Director: Neill Blomkamp.
(Please note: These films don't have to be the first film of a director's career. Furthermore, if an actor-turned-director created only one film BUT it became a critical hit, this will qualify. Films must also have a minimum 7.4 rating.)
Which of these films from a one-hit wonder movie director was your favorite?
After voting, you may discuss these rare gems here.