2 players stand in services boxes hitting volleys to each other. Play a continuous rally, counting to try to make 50 shots in a row. If they miss or the ball bounces before a shot then they have to start again at 0.
Only allow the players to use one side of the court- so that their volleys need to be more precise.
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.