Comparison of American football and rugby union

An American football professional game in 2007 showing the ball carrier running behind his offensive lineman; he may lateral to avoid a tackle, but this is exceptionally rare as possession is generally guaranteed and a lateral that is fumbled or not recovered by a teammate is likely to result in a turnover

A rugby union match from the 2011 World Cup showing the sport's distinguishing feature: the ball carrier leads his team up-field, passing backwards in the event of a tackle