"Well, you're free to tell him that in person once you're sober." Assuming he still thinks it's a good idea, which Ginko is certainly hoping he will not.

Oh for fuck's sake there he goes again. Ginko makes a strangled noise and grabs Joker's arm again. "--Joker, no. The reason I got hurt last time was because I had to get you out of a tree, if you try to fly now we're going to end up in that exact same situation. If I don't have to climb anywhere, it'll be fine."