Later on, Danny might feel bad about being ditched, or something, but one of his defining characteristics is enjoying a show. This is probably very serious, given they're all as likely as not to starve to death, and he suspects whatever Felix is doing has potential injury or death as a result too, but he's still delighted by the spectacle.

Isidor's response is less delightful. Her emotions are palpable, even from where he's standing, and he has to resist the urge to duck and slink into the crowd, even though her attention's not on him. He hasn't exchange a word with her since his arrival, but he got the impression she was no one to be trifled with, and watching her now just reinforces that impression.

When Felix asks him to follow, he starts to move, glances warily at Isidor, and then darts after the man like a skittish cat. Whatever he's got to say, Danny wants to hear it.