During the Roskilde festival 2016, activist art group The Yes Men had set up fake signs stating that the festival would be collecting and infinitely storing all text and phone conversations of visitors on festival grounds.

Before the nature of the signs was revealed as a provocative prank, many festival-goers showed both despair and anger. The group’s stunt culminated in a live performance with a fake Edward Snowden who got on stage in the role of an almost tech-illiterate imposter, and finally a talk given by the real Snowden via web stream.

The whole process has been documented by The Yes Men as a 12-minute film about digital surveillance, the data stunt, and Edward Snowden’s talk.