So here we go!
You’ll need your non-throwhand as dry as possible, I use a hair dryer. “So, what you do,”-Andre Boulay.
You just throw a sleeper, and you grind the yoyo right where you can bend your wrist, on top of your hand. Angle your hand so the yoyo just grinds there, like a throwhand grind, kinda. Then, you cup your left hand below the right, tilt your right hand so the yoyo moves forward and off your hand, and catch the yoyo in the palm of your hand. It should grind there. And just throw the yoyo off your hand to finish.
I need a name! For the trick.