Have you ever ridden a unicycle?  It takes great balance to ride it since there is only one wheel that touches the ground.
I have not. I do not have good balance even when walking so I can't imagine trying to ride a unicycle!
I understand.  I think the unicycle is great.  In fact, they have recently started to be used to create different sports like unicycle hockey!  
That sounds really interesting! It would be fun to watch people trying to play sports on unicycles!
Yes.  The unicycle hockey is just like roller hockey, but, obviously, the players have to ride on unicycles.  
Hockey in general is hard to play. I can only imagine while trying to maintain balance!
Think about this: in recent years, unicycles have also been used in activities like mountain biking.  Again, mountain biking itself is difficult enough on a bicycle - now try it on one wheel.  Amazing.  I could never do that.  
That is actually mind blowing. You would think people would be scared for their safety!
Unicycle
A unicycle is a vehicle that touches the ground with only one wheel. The most common variation has a frame with a saddle, and has a pedal-driven direct drive. A two speed hub is commercially available for faster unicycling. Unicycling is practiced professionally in circuses, by street performers, in festivals, and as a hobby. Unicycles have also been used to create new sports such as unicycle hockey. In recent years, unicycles have also been used in mountain unicycling, an activity similar to mountain biking or
or not. But there are a lot of good actors out there who even look like Nathan Drake and who could do it. I love the project, I think it's a great adventure and it's a wild insane ride ... the game is and the movie will be. I mean it has pretty great character at its core, Nathan is a bit of a con man, a hustler ... knows his stuff, ballsy..it's great. Absolutely. And then you know you have to do what a movie