Note: Jane is making an ironic joke that may be lost on modern readers, and may have even been obscure for contemporary readers. Parkour was a solo performance sport on Earth throughout the 21st century, best described as “extreme walking”. Like other solo performance sports, Parkour involved planning and executing routines which consisted of a series of choreographed, usually physically-demanding moves. The unique aspect of this sport was that no special equipment or arena was used. Participants would conduct their routines in normal streetwear, and often across public cityscapes. It’s popularity lasted longer than Figure Skiing but it did not have the staying power of Gymnastics or Micrograv Tumbling.