This is the exact same thing as a
propeller, except that the
devilstick is in a plane perpendicular with your body.
You can do it with either handstick.
Variations:
When doing the one handed saw, do one rotation on the front side of the
handstick and the next rotation on the back side of the handstick.
When rolling over the back side of the handstick try doing it with
knuckles down and knuckles up. This variation submitted by
Masaki Nishikawa.