This is a fantastic way of putting pressure on your opponents with a long kick.

If a player is standing on or behind their 40-metre line, they can gain ground by kicking the ball into their opponent's 20-metre area.

However, the ball has to bounce in the field of play before going out to touch inside the 20m area.

If the referee is happy all these things have happened, they will give the attacking side the head and feed at the scrum.

This will almost certainly give the attacking team possession again and six more tackles in a promising position.