Those words mean a lot to Sarah, and it shows clearly by the bright grin and faint blush on her face. The Doctor never gives out praises like that so easily. At least, not the version she's been travelling with lately.

"Thank you," she says softly, glancing down at the table for a couple of seconds. She looks back upward and the hint of a mischeivous smile comes back. "Maybe I should change that to a fantastic influence then, eh?"