UFO / Sleeping Beauty
Throw the yo-yo diagonally in a 45-degree angle down to the left. If you do a flat throw you can let it sleep sideways like an UFO. Grab approx.15 cm over the yo-yo into the string and lift the yo-yo up as it rotates flat. With a short pull of the free hand you get the yo-yo back into the hand.  

So you can untwist twisted strings very fast. With a UFO to the right the strings twists again.

Yo-Yo Trick UFO Sleeping Beauty!