Wikipedia
Muxmäuschenstill
Muxmäuschenstill is a 2004 German mockumentary film directed by Marcus Mittermeier, written by Jan Henrik Stahlberg. The film follows a vigilante named Mux (Stahlberg), who lives in Berlin and used to study philosophy. He wants to bring justice to rapists, thieves, and vandals in his own way, documenting all his actions through a camcorder lens held by his friend Gerd.
The film won the Max-Ophüls-Preis 2004 in 4 categories and was nominated for the Bundesfilmpreis 2004 in the category "Best film".