[ He waves back when he catches sight of Vash, face collapsing into relief. He's been working on calm as best he can, but it's a lot easier when he's not the only one who knows he's down here.

Well. Him and the dog. He tilts his head a little as the other guy disappears from view again, listening, but it doesn't sound like the dog's still running around. Abandoned by his new friend. ]

Just take it easy, it won't do any good if we're both injured down here! I can wait if you need to go back and get... something? [ it lifts at the end into the awkward question of a kid who really does not know what actually helps in medical emergencies. ]