No, these subway ads aren't from an alternate reality at all. They're from history. And yes, that does appear to be a child laying in a pool of his own blood, while a man walks over to make sure he's really dead.
Everyone! Hey everyone! It's official. As in, I, me, have just declared these automatically-reversing seats on a Japanese train to be the new Best Thing Ever. Why hasn't America, home of achievements like the iPad and the Apollo program and the KFC Double Down, not thought of this???