Well...it's just that I remembered something that happened then. There was a time where I'd felt very strange. And I'd...gone back, I think, to Culloden. I could hear the cannon firing around me, and then...then...

[For a moment, he looks distant, trying to come up with a way to describe it.] It was like I was drifting through a dark mist, rippling like the surface of a lake, but then it cleared, and I was in an alley with the Doctor and Zoe.

The Doctor said I'd fainted, but it was more than that, I think. He said something else, about it being as though someone somewhere was helping us. I wonder if that wasn't true.