Apparently you can lead the Segway (his $5K self-balancing scooter) up and down stairs by hand. You don't ride on it, it's wheels aren't right for climbing, but you can sort of drag it in a self-powered mode and it can handle the stairs. That's good because it weighs 80 pounds so you wouldn't want to carry it.

They had one of these on display at Epcot's Innoventions pavillion not long ago. The demo was amazing...after sending it up stairs and ramps, the sales dude sat a volunteer in the chair, made it elevate up onto two wheels, and gave the thing a SHOVE. The crowd gasped, expecting the woman in the chair to go flying off the stage, but the chair just sort of skipped forward a little and shrugged it off, wiggling on its wheels, looking for all the world like a large man who'd just been bumped into. It was stunning.