My theory is Bret puts his left leg in, the old school working the left method, and virtually everyone else puts their right leg in. This would be fine, but I think they forget you then have to mirror or reverse every other step from how Bret does it because you’re on the opposite side of the body.
Like I’m positive that’s what Rock did wrong. The way he crossed the legs was technically how Bret did it, but to the wrong leg. So once he realized that, he just shoved both legs to the side because there was no way to pressure the legs over his knee.