While the road cyclists took to the mountains for the first time in this year's Tour de France, they found themselves briefly upstaged by a daredevil mountain biker.As the lead group tackled the second climb of the day - Pleateu des Gilieres - TV cameras behind the bunch caught the outrageous stunt, as the mountain biker - later identified as Alexis Bosson - rolled down a slope and off a ramp to soar over the road and down the other side.He even pulled a no-hander in mid-air, probably to the amusement of the Tour riders.Shortly after his move at the Tour de France, Alexis Bosson also shared a video clip with his friends, which was shot during an attractive show by a camera on his helmet.See how this jump was seen from his perspective!