Bucky ball falling out of the game field

In performing a demonstration we found that the large bucky ball can fall out of the field of play. Is the team that knocks it out going to be penalized or will the referee simply put the ball back into play?

There is no penalty for knocking Game Objects out of play. As per <G8> Game Objects that leave the playing field will be promptly returned (by the referee) to the playing field at the location nearest the point at which they exited.