Want to win a pair of Sunday Octave Forks with 41 Thermal heat-treating? Then simply film yourself doing all 3 tricks that Cory does in this video. Just do a bike spin, barspin bike spin and a double bike spin. Once you've filmed yourself doing them, post the video to Instagram with the hashtag #coryfoustchallenge. You have until Monday September 16th to get your entry in. Winner will be chosen at random.