Riding “up”
Basic principle (always refer to this): you can’t ride “down” – some people can ride up, but you can “never” ride “down” (downhill in the below diagram).
Basic principles:
...
Riding “up”
Basic principle (always refer to this): you can’t ride “down” – some people can ride up, but you can “never” ride “down” (downhill in the below diagram).
Basic principles:
...