Someone did something very bad today. Police have closed off a coupla blocks here in Washington Heights, off St. Nicholas at 173rd and 174th. 2 police choppers circle overhead. 250 cops are swarming around. Nobody knows what's going on. And nearby, leaning out of the passenger-side window of a parked car, a dangerously obese Dominican kid is repeating, over and over, "We will, we will.... [long pause, waiting for a pedestrian to pass into his target zone] ROCK YOU!!!" With every punchline, his face is screwed up in a little ball of fat, eyes pinched shut, spittle flying out of his screaming maw.