Ginko would point out that that doesn't make going off on his own a better idea, but knowing Joker... if he's going to be miserable one way or another, he'd probably rather be miserable on his own.

Unfortunately, they both know from experience that's a bad idea - besides which, Joker still has to wait for the cure to finish working on his leg.

"You've just got to hold it together for a few more minutes. You can go home right away after that, alright?"