As she extends her influence around him, he gasps in relief, his hands falling down to clench in the sand. He knows that he doesn't dare give over the entire burden to the TARDIS. He's still clinging desperately to his Grace, forcing containment, but this helps. This helps immensely.

He shudders out a breath and laughs, sharp and tense. His heart is still beating fast in his chest, the panic taking hold of him. He has to reassure himself that this is helping, that he's not going to hurt the TARDIS by keeping her here. "I could kiss you," he finally manages to say. "Thank you."