In Hammer’s autobiographical experimental film A Horse Is Not A Metaphor, the artist reflects on her personal fight against stage 3 ovarian cancer, transforming illness into recovery. Describing herself as a cancer "thriver" rather than a "survivor," Hammer rides on horseback through the red hills of Georgia O’Keefe’s Ghost Ranch in New Mexico, the grassy foothills of the Big Horn in Wyoming, and leafy paths in Woodstock, New York. In this multilayered film, Hammer moves from scenes of chemotherapy sessions to images of light and movement that take her far from the hospital bed. The haunting score is by musician Meredith Monk.