"So what's your name?"

I kept on asking questions like that with him,. but he seemed like he was in another world, and frankly, so was I after that weird incident comming off of the train. I remember him saying something about a light which was weird. It was really weird too that his name was David also. I know, it's a common name, but how often do you meet people who get blinded by light and have the same name as you?