Sofia's Last Ambulance (2012)
Sofia's Last Ambulance (a co-production of Germany, Bulgaria, and Croatia) is a feature-length observational documentary film by Bulgarian director Ilian Metev. The film premiered at the 51st Semaine de la Critique (International Critics' Week) at the 2012 Cannes Film Festival, where it won the inaugural France 4 Visionary Award (France 4 Prix Revelation). It was the second documentary ever to compete in the section's 51 year history.
More at Wikipedia.