Barney faces an epic challenge as he attempts to surf one of the world's largest tidal surges, the Severn Bore! With waves of up to 50 feet, he tries to hold his balance and his nerve. It is the final week of the 2014 Sport Badge, so we will be celebrating the thousands of applications we have received this summer with a look at viewers' sporting achievements. Also, we give a special sporting superstar our highest accolade - the gold badge.