Proc? (Englich: Why?) is a 1987 Czechoslovak drama film directed by Karel Smyczek. It was screened in the Un Certain Regard section at the 1988 Cannes Film Festival.

The film deals with the hooliganism in Czechoslovakia, particularly with the fans of football club Sparta from Prague, whose supporters were the pioneers of the football fan riots in Czechoslovakia, starting with hooligan actions already in the 1960s, like breaking the trains in which they travelled when they went on Sparta’s away games. The film deals with one of such episodes.

Cast:

   Jirí Langmajer – Jirka
   Pavlína Mourková – Marie
   Pavel Zvaric – Petr
   Martin Dejdar – Sury
   Jan Potmesil – Milan
   Daniel Landa – Pavel
   Miloslav Stibich – Train Passenger
   Miloš Kohout – Football Manager
   Michal Suchánek – Drunken Football Fan
   Jan Kraus – Football Fan
   Roman Holý – Football Fan
   Petr Vachler – Football Fan
   Antonín Jedlicka – Man in a car
   Karel Smyczek – Reporter