Two fielders each have a ball and they take it in turns to throw the ball to the worker.
When the worker catches the ball they throw the ball back to the same fielder that threw them that ball.
"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.
As we enter the business end of the competition, we take a look at the remaining eight teams and the key talking points surrounding each side.