Biffy Clyro – Mountains (Cover) Jun 12, 2015 Cover, Cover Biffy Clyro, Cover Hard Rock, Cover Mountains, Only Revolutions, Band Practice 14/09/2013. Like 0 Thanks! You've already liked this « The Thaw – Biffy Clyro (Acoustic Cover) [K&O Simple Cover Sunday] » Biffy Clyro – Opposite (Acoustic cover)