This is for popping whilst unhooked:
1) Keep your kite low at 45 degrees through out the trick.
2) Bear off slightly downwind before unhooking so you position your board correctly before the kite pull
3) As the kite power increases, Lean back with your whole body, driving off your back leg so the board heads upwind
4) As you feel the kite power reach a peak. Release the edge of the board by bringing your whole body forwards.