Four players hold a mat. On this mat is a heavier ball (basketball).
The white players are hopping on one or two legs touching, bumping into the blue players, trying to get the ball of the mat.
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.