 Astonishingly it was filmed over four and a half days at the Scottish music festival T in the Park in 2010 where the cast and crew had to adopt a kind of guerrilla filmmaking approach to shoot amidst the chaos of a music festival alongside over 100,000 revellers.It premiered at both T in the Park in 2011 and at Austin's SXSW.Sigma's Brian Coffey collaborated with Irish production company Blinder Films to produce Ciaran Foy's "Citadel" (2012).