It takes him some effort to flick the switch, to fight all-out against Selina, but once he does, it's done, and he's going at her with all he's got. It's enough that he sees both blows coming, accurately guesses some of what they're going to do. The elbow is obvious, and he ducks just slightly aside from it and reaches out with his left hand in the beginnings of an attempt to grab her arm and pull her down--

--but then she catches him on his shoulder. That jab he doesn't manage to avoid, and it completely destabilizes him. His fingers spasm open, and the blade vanishes out of his hand.

He turns to blink at her in incongruously innocent wonder. "How...?"