The player tosses the ball up and leaves the non-dominant hand in the air. Ball should drop into the player's hand.
Toss can be a limiting factor in player's serving accuracy. Player's ability to toss the ball into the proper spot is a necessity to achieve high consistency in this shot. Player has to learn when to make a decision to let the ball drop and start the action all over again.
In this particular exercise, the player works on 2 aspects at the same time. Firstly, the player learns how to toss properly by having a visual target (non-dominant hand) for the ball. Secondly, the player makes a habit to keep shoulders alignment (straight line between both shoulders).
World Rugby has reportedly conceded Aaron Smith's disallowed try in the World Cup final should have stood.
"It is not only useful for staff who are experienced but a valuable tool for those subject staff who have to take teams."
The variety of sessions across sports - sometimes we steal session ideas from one sport and use them with another.