for two days in june the top riders, and a few wannabes, descended on scotland's nevis range to test their ability on one of the toughest - and wettest - outdoor courses in the sport. >>reporter: the spea fim trial world championship. finding the 'roll of the rocks' the world's elite trial riders strut their stuff on the scottish mountains of the nevis range. >>one of the sport's biggest stars -12 time world champion dougie lampkin was there hoping for his 100th grand prix win. he made it to the podium on the first day but didn't make the final cut. >>lampkin: i've always been very hungry for success i've never been satisfied with what i've already achieved ...i don't like losing - i really don't like losing - people may say it but they don't really mean it. >>reporter: forget losing the championships, in these conditions it's surprising more riders don't lose their heads. this is no sport for the faint hearted... >>the bikes have no seat, riders must stand on the pedals, testing their balance and throttle control. each time they touch the ground - called a 'dab' - a point is scored