In March of 2014, I attended the first screening of Euromaidan: Rough Cut—a collective documentary chronicle of Ukraine’s Maidan Revolution. Quite unexpectedly the event ended with an improvized mourning ritual for deceased Maidan protesters. Observed in the film, this ritual then transcended the screen and spread through the audience, stimulating an experience similar to a “collective catharsis.” What are the reasons for such a strong affective response to a visual document, capturing the fluidity of still unfolding revolutionary events? This article (written before the Russian invasion of Ukraine) considers both the documentary and its screening as invaluable research sites, allowing us to study ethnographically the uncertainties preceding and accompanying the reification of (new) ideological narratives. By discussing the multifaceted understanding of cathartic experiences in the complex processes of group-building, truth-finding, and justice-making, this article considers new directions for the anthropological understanding of collective catharsis, as it has been experienced in post-industrial democratic societies.