Artist Aeneas Wilder poses next to his latest work Untitled #155 on July 27, 2011 in Wakefield, England. Wilder spent 200 hours using uniform lengths of wood, without fixing materials, to make Untitled # 155, a freestanding structure inside the Longside Gallery at Yorkshire Sculpture Park. The work was specially commissioned for the park. At the end of the three month show Wilder will demolish the work with a “kick down” event, a powerful act executed by the artist that brings the structure crashing systematically to the floor. (Christopher Furlong/Getty Images)