The Doctor makes a kind of shrug with his arms and everything. Because everything is an act.

"I'm the Doctor."

Statement.

"And you're not the King of Scotland. But I think we pretended you were at one point... Or did I pretend I was? That was aeons ago.... So what was your last adventure with me? The Cybermen's Tomb, have we done that yet? Or those Space Pirates? I'm a time traveller, hard to guess where you're at in your timeline."