What two words are worth $500,000 each? In the case of HOVERBOARD (R) re-seller The Space Chariot, those two word are “UL Certified.” (Yes, HOVERBOARD is a federally registered trademark; while it appears to be on the road to becoming generic, that’s a topic for another day.) Why they are called HOVERBOARDs is beyond me. They clearly have wheels that touch the ground, but if kids (or those “young at heart” who prefer not to use their own horsepower) want to use their imagination, far be it for me to intervene. Most people have seen these devices on the street and have figured out that operating them relies on tilting them with your body weight, much like a Segway scooter. But unlike the Segway, these inventions have a history of bursting into flames at the most inconvenient of locations, which is why so many airlines have banned them from flights.