Michael Stuempel wrote:
perhaps a better way would be to say "roll your hips forward until they lock in line with my back leg and the hips become in-line with (part of? welded to?) the plane that your back leg makes with the joint at the hips.
I actually have to tilt my hips *backward* "until they lock in line with your back leg", as I have a slightly hollow back (expr?). So maybe a more universal tip would be to, well, *wiggle* your hips until (and that's the important part) "they lock in line with your back leg"...