►Watch the 37th Burton US Open LIVE from Vail, Colorado where the best riders will compete in the slopestyle semi-finals. This is the men's slopestyle semi-finals event you won't want to miss! _________________________________________________ Experience the world of Red Bull like you have never seen it before. With the best action sports clips on the web and original series, prepare for your "stoke factor" to be at an all time high. Subscribe to Red Bull on Youtube: win.gs/SubToRedBull Get the FREE Red Bull TV apps for all your devices: go.onelink.me/351027264/35a30660 Red Bull on Facebook: win.gs/redbullfb Red Bull on Instagram: win.gs/RedBullInstagram Red Bull on Twitter: win.gs/redbulltwitter