Never heard of that technique. Wouldn't really want to try it either. If trying to make it "stick" last thing I would consider doing is retracting the flaps. My reasoning, the last stage of flaps are the "draggiest". I don't want to reduce the drag (any more than ground effect already has).
Any way, knowing my luck I'd retract the gear and not the flaps. Still, it would be a ripper of a short field landing.
