The Five Obstructions

The Five Obstructions is a 2003 Danish documentary film directed by Lars von Trier and Jrgen Leth. The film is conceived as a documentary, but incorporates lengthy sections of experimental films produced by the filmmakers. The premise is that von Trier has created a challenge for his friend and mentor, Jrgen Leth, another renowned filmmaker. von Triers favorite film is Leths The Perfect Human 1967, and von Trier gives Leth the task of remaking The Perfect Human five times, each time with a different obstruction or obstacle imposed by von Trier.

At the Berlinale 2010, Lars von Trier, Martin Scorsese, and Robert De Niro announced plans to work on a remake of Scorseses film Taxi Driver. The film will be made with same restrictions as were used in The Five Obstructions.

Source: Wikipedia