Funny move, but very simple. As if to do a halo, put the staff on your shoulder. But turn with it instead. The staff should do a funny little one beat wobble on your shoulder as you turn, stop turning and it should do the halo, at which point you can turn again and it'll do the wobble again.
Turn as much as you like, try the other direction, and so on. You'll see mine in the vid is pretty sloppy as it goes horizontal in the end. (this is a vertical move) but that's what you get for not practising.
(Right click, save target as... )
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