For years, people with foot or ankle problems have been prescribed "rocker shoes, " in which the soles curve like the bottom of a rocking chair to transfer the workload away from joints and bones.
What we're about to show you is decidedly low-tech -- it's essentially a projection screen with a sharp curve at the bottom -- but the resulting effect conveys a more realistic 3D image, for certain applications, at least.
Her skates are chunks of steel as long as 13 feet (the crew changes skate length according to ice conditions), with an almost imperceptible curve along the bottom and a razor-sharp edge so that the skate bites hard into the ice.