Lady, That's My Skull

Jhonen Vasquez says he wasn’t consulted on new BOOM! Studios ‘Invader Zim’ comics

So because parkour is such a ridiculously male dominated sport, the "correct technique" for a lot of these movements that you're taught when you become an instructor plays to a male body's strengths: upper body strength, higher center of gravity, etc.

She demolishes this course by moving in ways that make sense for her body. She doesn't muscle her way up to her over a wall, she just throws a leg up over the wall. She doesn't use upper body strength to do the salmon ladder, she uses her hips!!! And it's fucking incredible.

So many girls and young women walk away from parkour because every movement caters to the strengths of men, because doing what makes sense for their bodies is seen as "bad technique" to be trained away.