Will Richard Overcome His Fear Of Heights By Abseiling Down This Dam Wall? | Richard Hammond s Big

Richard is facing his biggest fear, he s requested to climb down one of the biggest walls in the world. Will he overcome his fear of heights? Subscribe to Discovery UK for more great clips: http://www.youtube.com/subscription_center?add_user=DiscoveryTV Follow Discovery UK on Twitter: http://www.twitter.com/DiscoveryUK