Volley the ball to your partner who digs the ball to themselves then volleys the ball back to you, whilst they are doing that you do a dive, roll or something else then they do the same as you dig and volley. Do this for a set time or number of good contacts.
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.