And this is why they tell you stand back from the edge of the platform. A 57-year-old man had some skin torn from his face when he was struck by an oncoming subway. The victim had been leaning over the tracks to check for an oncoming train at the uptown 2 station at West 14th Street yesterday afternoon, yet somehow didn't have enough time to lean back before the train actually came. He was thrown back from the platform, and a Post staffer who witnessed the aftermath said, "His hand was twitching a little, he was lying on his side."