You and a buddy are watching the Knicks game at home when the refs make an egregiously erroneous call. The two of you hurl obscenities and whatever’s handy at the TV. Meanwhile, on the sideline, coach Mike Brown flaps his arms as if trying to fly, but he’s unsure of whether to call a challenge. He cranes his neck toward someone in the second row behind his bench. Your buddy asks, “Who’s the dork with the iPad?”Dork? No. That’s a hero. In Game 2 of the Fin