Drop from a height and watch it spin!
Once you've folded, blow through the hole to inflate this mini helicopter design. Make sure the wings are curled so they catch the air at 90 degrees from the sides of the body, and that they curl in the same direction as in the video. Experiment with wing curling to get the best spin, then drop with the central hole facing downwards. The speed of rotation will increase the further it falls: try launching from the top of a stairwell!
