The angle was calculated very precisely. If she went over too far, she could land in the flat center of the U-shaped ramp.
The force of the drop would then feel like freefall, and she would certainly get hurt.
She had to land at just the right incline to convert the falling force into downhill momentum and remain unscathed.
This required precise calculation for every move; if one calculation was off, the entire trick could fail.
It also required substantial practice, superb skills, and a bold yet cautious style.
In essence, this sport is all about controlling, mastering, and manipulating force.
As long as the 'force' is precisely controlled, understanding its principles and directions and how to manipulate it, the sport isn't difficult.
This is a sport that requires exceptional skills.
What makes it challenging is that many people find it too risky and daring, which keeps them from trying it.