There was. It was a very fine line, he supposed. He wanted to think that he couldn't, but the truth was, he was too afraid. He could admit that, couldn't he?

No, no, he couldn't. In fact, he found he'd forgotten how to speak entirely. Must've been the next stage in this drug. That was, well, really unfortunate. They were almost getting somewhere with this conversation.

It left acting, only. How should he act? Should he kiss Jack? Pull away? Instead, the Doctor sat there, petrified between his options.