Most of us do this a little, the cross-court volleys in succession.

I remember the first time I saw someone do it: it was the Hunter Lott, down at Penn’s Rindge Courts, circa 1982. I was amazed. Obviously much easier to do with the wider court and slower softball, so it is much more common today in the U.S. than thirty years ago. 

My colleague Alan Thatcher alerted me to someone who can really do the figure eight routine—while standing on an inflatable yoga ball (what the British evidently call a Swiss medicine ball).