grandstand play
1. In sports, any excessively showy action or maneuver during play done primarily to impress or entertain the spectators. Originally specific to baseball, it has since been extended to any sport. Rather than shoot the ball and secure an easy two points for the team, she instead attempted to slam dunk the ball as a grandstand play for the crowd.
2. By extension, any excessively dramatic, showy, or ostentatious action, behavior, or maneuver. Our manager is more concerned with making a grandstand play for the CEO than effectively running the office. The dictator's constant threats of war are more of a grandstand play than a legitimate concern to the rest of the world.