Players set up a circle with one defender in the middle and one ball per group.
The players on the outside of the circle must pass the ball and try to keep it away from the defender.
The defender stays in the middle until they steal or deflect the ball. When that happens, the pass who threw the pass will become the next defender.
Players cannot pass to the people on either side of themselves.
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.