His fault; how do you get hit by a train?
I believe it was mentioned somewhere on the first page that he was listening to music and texting when he was crossing the tracks. But it is a bit odd that he wouldn't feel the vibrations.
That aside, that is pretty sad.
I still don't really get why we cry about someone who we hardly know (I'm not saying it's a bad thing), but I guess it's just the thought of "I'm not going to be seeing that person ever again" that gets us. It reminds me of when my great grandmother died last year- I hardly knew her, in fact, I'd only seen her 2 or 3 times, but I still cried when she died (but I'm still not sure if it was seeing her daughters burst into tears in the middle of the funeral that got to me)