Swingin pullin droppin as if it all never happened
Kamila Szejnoch's work Swingis the winner of this year's Szpilman Award ("awarded to works that exist only for a moment or a short period of time"). The Swing was suspended on one of Warsaw's largest (and scariest) monuments, the monument to the Berling Army Soldier. (for posters in the same vein and for Szejnoch's commentary, see here).
Two other works I particularly like from among the finalists are Sai Hua Kuan's Space Drawing and Kate Mitchell's I am Not A Joke: