Cool footage has emerged of mountain bikers taking on the iconic and particularly risky "Hangover" trail in Arizona, US.br br The video, filmed on a professional mountain biker's helmet cam on January 1, shows the daredevils braving the trail which has a steep cliff just inches to the right of the path. br br The filmer later wrote online: "Mountain Biking the iconic Hangover trail in Sedona, Arizona with Alex Petitdemange. br br "This trail is unique due to its numerous head-high rocks that must be ducked under." br br "Most of this trail is highly exposed as it traverses along a cliff to the right," he continued. br br "One mistake could result in disaster.