I have skied Big Sky a lot in my snowboarding life, and I haven't even gotten close to having enough guts to ski the Big or Small Couloirs at Big Sky Resort.  Even expert skiers can be taken down by it, and if you go down - it's going to hurt.  The Coiloirs are listed as Big Sky's #2 and #3 scariest runs - followed only by the half pipe that is known for tree hitting accidents.  Have you had enough cajones to ski either of these?