Yeah it had to be flash forward, when he saved that boy and mom. I think its shitty that they tell us what happens.
But what was that article about that he was reading on the plane then showed Kate at hte airport? It had to do with the funeral that noone showed up to, and kate said why would she go. So that makes me belive that it was Sawyer that died and no one came to his funeral except Jack.
And yes i found the razor to be a little wierd also, i like and hate these little hints bc they always keep me wondering, which i guess is the point but fuck!