[The behavior is odd, and Narsus isn't quite sure why someone would be so uncertain of what they'd seen. But he's still disoriented, so he's willing to go with it, not having any real reason to conceal the basics of his vision:]

...A battlefield. [He glances over Val's shoulder again, wincing just slightly at the memory of the vision, although thankfully the wall is now coming into focus.] I was...running to the aid of a friend, seeing him hurt. I thought you were an enemy soldier blocking my path.