Can't remember what led me to this but while I was in Paris attempting to lift up and jump back I started to throw my head back and lift from around this area (had to look it up after I got home, interesting it's called the handle). Now when you connect it to your uddiyana and moolah bandha and lift up from there a surprising thing happens. You seem to ge more lift but then all of a sudden your tilting forwards, or rather, flying forwards. It's as if there's a shift in body weight allowing you to pivot more effectively. You don't have to try and throw yourself forward anymore it just seems to happen automatically.
I checked all my videos on my ipod but nobody has their head thrown back. So I tried to continue to lift from there but tilting my head forward instead of back. Still a bit awkward at the moment but I think it's having an effect, as i had a couple of really good jump backs this morning.
Now this is where it gets interesting . The tilting the head forward, chin-in bit, reminded me of the third bandha I always forget about, Jaladhara bandha, the chin-lock. According to Swenson you extend the chin forward and then draw it back into the notch formed by the two clavicle bones.
When you engage all three locks (for example in Janu Sirsasana) it's called Mahabandha or the great lock. It seems to make sense, you engage all three bandhas linking them tightly together and then pushing down with your arms you lift up from the handle (the manubrium) pulling your whole body up in one go with no lost action (see lost action post). Held together like this your body weight appears to shift upwards causing you to tilt forward sending your legs back and through.
need a little more practice on this but will try to put a video together and add it here by the end of the week
Let me know if you try this and if it seems to help.
Ps. think the picture comes from Gray's Anatomy