Step one: unbolt front wheel hub. Step two: remove wheel. Step three: show off massive balls. What professional trials rider Ib Vegard Andersen is able to do in unicycle form is quite a sight. In a bit of cheeky fun, you can see his front wheel laying in the middle of the warehouse.
Yeah, I'd be lucky to do any of that on a properly assembled trials motorcycle. If you have the time, check out some more trials riding online--it's full of talented guys like Andersen.