Knall and Fall as Imposters is a 1952 Austrian-German comedy film directed by Ulrich Bettac and Hubert Marischka and starring Hans Richter, Rudolf Carl and Curd Jürgens. It was followed by a 1953 sequel Knall and Fall as Detectives. It was shot at the Sievering Studios in Vienna and on location across the city. The film's sets were designed by the art director Fritz Jüptner-Jonstorff.