A snowmobile rider got wiped out by his own vehicle - before it went careering down the slope and crashed into a tree in Montana earlier this month. <br /><br />In the video, filmed in West Yellowstone, the hapless rider is trying to make it back to his sled after falling off when it slides downhill and hits him.<br /><br />Writes the filmer, a friend of the man hit by the sled: "It all started with three sleds stuck on a hillside. One just rolled and another (went) upside down. <br /><br />"Then Nathan - aka the Snake - was working on getting his turned upright (when) the roll happened. <br /><br />"It completely levelled him and drove itself downhill into small pines, causing major front-end damage."<br /><br />According to an official local tourism site, winter brings an average annual snowfall of 143 inches
