In the Kazan gallery "BIZON" Antivystavka 72/3" opened ". What does it mean?

In BIZON gallery the unusual interactive exhibition — "Antivystavka 72/3 opened. The Volgograd artists to Kazan". Each visitor has a chance to become the main hero of performance — all works under veils, and it is possible to open only 3 of 72 exhibits...