Steering the Powered Monocycle

I was just surfing the Unicycling Home Page (www.unicycle.org), when I came
across the old picture of the powered monocycle:
http://198.174.169.200/unicycling/monocycle.jpg. Only, this time I noticed
something I hadn’t seen before. The rider is holding a steering wheel!

Would someone care to explain why?

Julian Orbach