YoYoJam DarkMagic
Leg Wrap Trapeze
Start with a Breakaway and swing it once in front of your body. (As you will see in the video, I grab the string while doing this to shorten it and make the trick easier.)
Step forward with your throwhand side leg and swing the yo-yo one full swing underneith that leg.
  Bring your throwhand side leg backwards, and bring your non-throwhand leg forward and allow the yo-yo to swing underneith this leg and behind the back and into a trapeze.
  Any dismount to return yo-yo to hand.

Download Video (Right Click-Save Target As)