This man can do things with a unicycle that you would never have dreamed of. And not just because you don't dream of unicycles on general principle. It's because Max Schulze can uni-shred. »
Here's video of Murata's Little Seiko » balancing robot up to its tricks on a unicycle. It's a smart little thing: as well as balancing on that single wheel with nifty gyro and counterbalance robotic action, it can do collision avoidance. And boy, if it isn't the cutest little robot you ever did see.