Speeding down a hill at incredible speeds on a mountain bike while trying to avoid numerous trees, plants and rocks is enough of a thrill ride for most riders, but not for these four kids from British Columbia. So in an effort to make things more entertaining, they decided to turn a trail through the forest into their own “giant sandbox.”Pretty impressive camera work as well. Not something you would expect from a bunch of bike puds.Here is a look at them taking a ride through their extreme mountain biking masterpiece.Well done guys, well done.