Wallaby Design by Dr. Paul MacCready
The late Dr. Paul MacCready flying his "Wallaby Glider." Body movements create slope current that the "pilot" keeps positioned under the glider.

Photo from February 2000 issue of Soaring Magazine, article titled "Pursuing Soaring Visions" by Chuck O'Mahony

21:32 minute video of Paul MacCready and Son Tyler (Tyler and walkalong glider appear after about 20 minutes) made in 2003. Video http://www.ted.com/talks/view/id/176