Yyaa shows film's capacity to manipulate the represented reality through montage. The artist filmed himself screaming "Yyaa!" in the same room, but lit in various ways. Then, he edited these takes into a single scream - impossibly long and impossible in reality.
The language of the door that this film captures is the result of a Latin-written text being translated into a material alphabet composed of the angle and direction of movement of the creaking door.
A Klapper is one of the first found footage projects made in Poland. By creating a film from existing representations, Bruszewski formulated the thesis that film relates more to other films (representations) than to any reality lying beyond the medium. A Klapper proves the artist's contention that we are condemned to operate in a sphere of reality that is interpretatively or linguistically transformed.