Julia Taffe's dance floor is 600 feet up in the air. Dangling off ropes attached to anchors on the face of the Stawamus Chief, Taffe and her dance company defy gravity. The team of six, all dressed in red, flow across the granite surface, jumping, leaping, and spinning. It creates the illusion of weightlessness, but it takes a lot of core strength, Taffe said. You turn a vertical surface into a floor.