On a unicycle you are failing (and falling) until you don't. That's about the best way to describe how to ride. According to Seth's blog, you don't want to create a product like this. People don't want to fail, they want to experience success - let's let him explain:
Learning things that are binary like this is quite difficult. They are difficult to market because people don't like to fail. They're difficult to master because people don't like to fall. "You don't get it, but you will," is a hard sell.Perhaps it is desire and passion that make people want to fail (and fall) again and again. Is this the attraction to do things like unicycling?