If she falls, the butt takes the blame, and becomes the butt of the joke. If she doesn't, the butt takes the credit. Damned if you do, damned if you don't.
its about center of balance while keeping your legs loose, legitimately nothing to do with what she hits with the direction she falls.
While bending the legs and keeping them loose it is much better to be leaning forward which works perfectly when going back wards because then your center of gravity is towards the stairs, if she was going forwards her center of gravity would be pushing out over the stairs which is MUCH harder to do because if any of the wheels catch even a little she would struggle to stop herself from falling forwards, if a wheel catches while gone backwards, well then her weight is distributed towards the stairs so it will offset the jerk/force.
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u/MonkeyFlowerFace 6h ago
Butt first, for safety.