Three players form a triangle with one player in the middle.
The first player throws the ball and the middle player tries to catch it, if they do then they can move on to the next person. If they drop it they have to throw the ball back to the same person and repeat this until they do catch it.
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.