The North Hall is the dark underbelly of CES, where earphones and iPhone cases go to die. It's also a pretty good place to check out some bizarre products with zero chance of making it to the mainstream, and that's certainly the case with the Inventist Solowheel — a crazy take on a Segway crossed with a unicycle. You ride the thing by squeezing the central pillar between your calves and leaning in your desired direction. What could go wrong?