Throw in drills

Player A has the ball like there is a throw in.Players B,C,D all are 10 feet behind him and want the ball.Player A says "set" which is a single to jog forward then he says "break" and they all sprint as fast as possible while he throws the ball.The player that gets the ball is the offensive player(player b) and is trying to score on the net and the 2 players that didn't get the ball are the defenders (player C and D).