With that incredibly uncomfortable confession out of the way, Ginko watches Joker's answer with some concern. He... appreciates what he can only guess the head shake is meant to communicate, whether that's insistence that he won't die or simply an expression of dislike for the idea.

The rest, though, he... doesn't have a clue about. Now it's Ginko's turn to shake his head. "Sorry, I... don't understand."

There's another phrase Joker has probably heard plenty of.