Yesterday, there were reports that a child was (thankfully only mildly) hurt amid a sledding frenzy in Prospect Park. But today, we learn the Ugly Truth: It was a Park Slope dad who sledded into that kid, then just walked away and left him there! What gives, Mad Dad? Were you trying to take that kid out because he and your kid were tied for the last slot left in next year's class at Berkeley Carroll? [Gowanus Lounge]