The keeper and the feeder work in each of the gaps between the poles.
The feeder plays the ball at mid-height into the keeper's body. Once the ball has been caught the keeper throws the ball back out and then turns to run between the poles and touch the ground.
After touching the ground behind the poles they should then run out to meet the next ball before turning to run between the next set of poles and touch the ground.
You can increase the fitness element of this drill by asking the keeper to run further behind the poles before turning back to catch the ball.
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.