On Oct 3, 8:37 am, Bill wrote:
....
I asked her if anyone had tried them down the stairs yet and
was told that she hadn't seen anyone do that 'yet' but they do race them
around on slow afternoons.
Bill

There are stairs in the factory test track but only the craziest
engineers ride on them. The fixed-handle model has a powered stairway
assist mode that lets you climb stairs dismounted, like pushing a reel-
type lawnmower.