Thought this might be the sort of thing Dan had in mind when filming:
http://www.telegraph.co.uk/news/newstopics/howaboutthat/9265515/Mountain-bikers-headcam-captures-extreme-downhill-ride-in-Colombia.html
Only slightly harder than wet and slippy railway sleepers!
http://www.telegraph.co.uk/news/newstopics/howaboutthat/9265515/Mountain-bikers-headcam-captures-extreme-downhill-ride-in-Colombia.html
Only slightly harder than wet and slippy railway sleepers!