YoYoJam DarkMagic
Boomerang
 
Start with a Sleeper. Bring it half way into a Brain Twister mount.
 
To launch it out pull your non-throwhand in a quick straight up motion. At the same time you are going to want to move your throwhand closer to your non-throwhand. (All the power really comes from the non-throwhand.)
  By returning your hands to their original postions it should cause the yo-yo to return falling back into the string. The key to this is to make sure that the string is straight between your hands.
  After repeating steps 2 and 3 a couple of times I moved my throwhand pointer up into the string in front of my non-throwhand and allowed the yo-yo to hit the string there. Move forward and into a Brain Twister dismount.

Download Video (Right Click-Save Target As)