Just like back on the school playground, players must hop scotch their way up the ladder.
For those who don't remember - two feet together in each rung and then two feet on the outside of the same rung before then jumping feet together into the next rung.
Repeat.
Helps to speed up leg / foot recovery from awkward positions.
Arms dictate speed.
Stay relaxed.
Stay up on toes / ball of your feet.
Perfect the technique then speed it up.
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.