Good morning
The idea is that one wheel won't be off the ground. The wheels pivot as you turn, like 3 wheeled mopeds.
There is a thread on here somewhere about the poor chap who had a life changing accident riding his Planet X bike off a kerb that he thought was safe to so do.
This got me thinking about how I ride off kerbs, rarely, but these are within a few hundred metres of home.
Bye
Ian