A "falling leaf" is just an over extended and delayed Flik-Flak. Step forward as you powerfully snap your thumbs down/reverse (at the kite). Have the kite hovered (upright) and about 2/3rd of the window high to start.
The kite will fall over the back (the Flik part) with the down spar bottom tips passing over 180 degrees, stalled. If you stepped forward and gave enough slack (like you can walk into it kind-of-slack) The kite will fall towards the ground. If you did it straight down wind and perfectly even in your hands,....then it will fall straight down wind.
At the last possible second, you execute the "Flak" part and unwind it back to upright. Step backwards to take out some slack (remember youv'e made acres of it!) and powerfully snap your thumbs up back towards your nose (Forward)
Either knock the hat off of an ant (just missing the ground) or stick that landing dramatically and call "out"
Slapping the water with a falling leaf is showing off