I learned to ride an electric unicycle
 

As a beginner, stepping onto an electric unicycle is equal parts frightening and exhilarating. There are no handlebars to grip or a saddle to clench between your thighs, just two narrow pedals separated by a small motorized wheel. Leaning forwards or...

http://www.engadget.com/2015/12/14/r...tric-unicycle/