"I'm not the grumpy type," he says, ruffling his munchkin's hair. "I'd be sad, though."
"Better not," the Joker agrees. "But don't worry too much about me if you do, okay? Your mummy's a patient kind of guy."
"And we told you about how one of me got stuck where the princess is now for a hundred years," Nathan adds, "and I was fine, because I knew you'd be fine. Wherever you are, you concentrate on being fine."
"Well, tell you what," says the Joker. "If you want me to stop calling you munchkin, you let me know, and otherwise if you get taller'n me I'll quit all by myself."
The Joker doesn't say anything about it directly. But coming from the Joker, well - 'Kerron' is all that need be said. It's just about the first time he's ever used the name.
"If I'd stopped growing when I was six foot nothing would I just be a munchkin for all eternity?"
Kerron snorts good-naturedly. "Yanno, your thing with names, probably not actually genetic?"