Well from my understanding... instead of powerbraking or whatever you would do for a lauch, you hold the brake and get the rpms just over ideal and when the third light goes off, LET HER BREATH
But someone correct me if im wrong
well it depends on how loose your girl is, but your thought is sound! If you have a 3k or so I would break stall to 15-1700 at the tree. A looser stall will allow a nicer RPM increase to flash.