Player 1 starts at 7 m in front of the post, player 2 signals 1-2 m in front of the post.
Player 1 takes the walkthrough and moves to 7 m behind the post. Player 2 catches the ball and passes at 1-2 m behind the post.
Player 1 takes a walkthrough ball from behind the post and catches his own ball, player 2 moves to 7 m in front of the post and repeats the exercise.