CLEVELAND >> Cavaliers coach Tyronn Lue was answering a question about Boston's defense on LeBron James during a teleconference when he tripped the security system at his home.A piercing alarm sounded."Uh-oh," Lue said Thursday as he punched in a code to silence the screaming siren.While Lue and his home were clearly safe, and the light-hearted moment passed quickly, it was also symbolic of Cleveland's urgent situation.