"Pray tell me, my dearest, my loveliest, how you figure that."

Reynard's lost his knife, but he still has fangs and claws, even if they're much less noticeable and dangerous in human form, so he didn't feel all that harmless despite it. Even more so because he still had his quick wits and his mouth and what more did a trickster like him need, when it came down to it?