The Doctor is only slightly breathless from the exertion, far more concerned for the man who's just resurfaced from what could have been quite a more treacherous situation. He's alive and conscious, that's always good news to start.

He lets go of his end of the belt only once the man is back on surface level, and despite the circumstances, the Doctor smiles softly, while looking him over.

"Officially, welcome back to the surface, we're glad to have you on solid ground again, do mind your step," he offers first with a slightly cheeky grin. "You okay?"