She can talk all she likes. He's not thinking. How can he think about anything except escaping the now talking Veil?

"Your count is sadly small. The Daleks enjoy torturing me as well. And the Cybermen. And the Weeping Angels. And of course, Time Lords."

River's movements seem rather timed to the Doctor. Which only makes him think more about the veil.

"Well. I have enjoyed our little chat. But you're getting too close for comfort, so it's time for me to go."

With that he turns and runs. Runs where he always has run: Away. Just away.