I see. So. Pony would rather, for whatever reason, duck in and head to the center of the arena. All things being equal, he WILL do that. But my leg creates enough pressure that things are no longer equal, and now it's easier for him to stay on the rail rather than being bugged by my leg pressure? I think that's what you all are saying?
So if he really really really wanted to go to the center of the arena, all of the leg pressure in the world wouldn't get him back on the rail, because he wouldn't mind the pressure, he'd just do whatever he wanted?
If so, that clarifies things a lot. Thanks!