Players stand in pairs on the attack line, one player with a ball. That player throws the ball against the net, while the other player sprints forward, and dives to dig the ball up in the air.
The ball will never bounce off the net in the same way twice, just like players will rarely receive the same pass twice. Players need to be quick to react to where it will drop.
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.