He stops a moment after her, turning to see what she's going to do. His only plan would've been to proceed in a random direction, so he's definitely open to something better.

To catch a clear picture of where she's pointing, he blinks his stinging eyes a few times. He moves in that direction when he has it, staring at her in amazement and a hint of admiration. "How'd you do that?"

It doesn't occur to him to question that she's right, because she's Luna. He hasn't seen her be anything but kind, so of course she wouldn't lie or make up something.