Flying a very close ground pass, the move is initiated somewhere before or after the center of the window while the kite still has power and pressure in the sail area. On most kites, the first action is to start an up turn by pulling the "up wing", while at the same time, dumping some air from the "up" wing. The second part actually pulls the "bottom wing" toward you, by pulling the "bottom wing" thus spilling air from that wing and forcing that wing towards you. To speed up this action, the final move is a push with the "up wing" hand again. This is the basic 3 step move for a stab, which is basically a variation of a snap stall. This is done very quickly! This sequence of hand movements does vary from kite to kite ie. high aspect, low aspect etc., but try this much first, and you will be on your way. I suggest trying on this on your own kite, first slow, and above the ground until you see the exact combination that you and your kites needs to achieve this, then bring it down close to the ground and STAB! It is easier to do the black hole as mentioned below, but I suggest to learn it, start at the top 5 degrees to the right of the center of the window and end up 5 degrees to the left center, executing it the exact way I described above, but the first initial pull will be harder to pull the wing around further.
Another way to do it is by simply driving hard at the ground in a dive and then (dependent on wind speed) about 2 kite heights above the ground, push one wing back and immediately pop a hard axel type move with the same hand.