It was 1929. The bloody May Day demonstration was shown in the newsreels. Not everything was shown, but some… enough of the savage and brutal actions of Zörgiebel’s police, the deliberate and cold-blooded murder of the defenseless workers, to get the idea. Even the good bourgeois audience at the Ufa-Palast am Zoo acknowledged the filmstrip with jeers and whistles. There were also those present that applauded the actions of Zörgiebel’s police with demonstrative clapping, including a towering Hun, who was sitting not far from Heartfield. Heartfield jumped up from his seat as if stung by a tarantula and hissed to the broad-shouldered German, “You swine! You swine!” When the performance was over, the Hun, lying in wait for Heartfield, grabbed the small, frail man by the collar: “Now you take back your insult, quickly - what did you say, what am I?” Heartfield, in an iron clamp, defenseless, barely breathing: “You are a swine.” The man knocked him to the pavement and hit him repeatedly in the face, furiously demanding: “What am I, what am I?” Him, tight-lipped: “A swine, a swine, a swine” - until he was liberated by the now-swelling crowd of passersby, bloody, bruised, half fainting.
—Wolf Reiss (Janos Reismann), Internationale Literatur 1934, no. 5, quoted in Eckhard Siepmann, Montage: John Heartfield