Fortunately, Ginko isn't interested in knocking Joker out - she just pulls away a fistful of energy, twisting her hand so that the thread of life-force snaps before she takes too much.

Joker is, however, really making her wish that she could knock her out without fearing for her safety. She's halfway to getting a reply out to that bullshit when Joker grabs her hair, and she hisses through her teeth, twisting out another sliver of energy. She's more cautious this time, though; she can only risk taking so much.

So she'll just make a grab for that bottle with her other hand.