If you are still coaching or teaching PSIA extension or pushing off or a wide stance with pivoting, you had better look at what is really happening on the world cup by the best.
PMTS Direct Parallel has been documented in books, videos, and DVDs for 22 years.
PMTS is the coaching of Harb Systems.
Here it is demonstrated by one of the top world cup skiers in his freeskiing.
Below notice the release of the big toe edge ski first! This is demonstrated by an "O" frame knee position.
The above photos show "flexing retraction" and "pull back" of the foot all in two photos. Jeandet holds his counteracting while releasing his legs and ski angles.
Compare the lifting of the stance foot and flexing of that leg.
In the below photos the tail of the ski is obviously lifted more than the tip. This confirms that he is pulling the free foot back, which moves the hips forward before he arrives at the falline.