It isn't clear, is it? It's a bit tough to concentrate on two things at once, so Armin stops his attempts at walking normally for a moment to clarify. It's rude, of course, but important. They're better off to just get it out of the way, aren't they? Then it won't be hanging in the air between them.

"I'm a human, so I'd like to know. If you're not interested in eating me...well, I appreciate that. But what about others? What should I expect?"