hex vs stun gun

"Stop," I said, or tried to say, before she thrust the stunner at my chest. I dropped staff and rod alike in a clatter of falling wood, and caught her wrist in both of my hands. She pushed the stunner up at my face, and I let her do it.
It got to within about three inches of me, the light bright in my eyes. Then I drew in a breath and puffed it out onto the stunner, along with an effort of will. There was a spark, a little puff of smoke, and then it went dead in her hands, like every other electronic gizmo seemed to do whenever I came around. Hell, I was surprised it had taken as long as it did to stop working. And even if it hadn't, it wasn't any trouble for me to hex it into uselessness.


Storm Front Chapter 20, page 229-230