Some interesting supporter psychology going on as well. In a crowd of 30,000, about 29,000 take the attitude "i'll leave it to someone else to make the noise". In a crowd of 2500, These fans thought "no. this is my job to make the noise and i'm not leaving this stadium without a sort throat".
Mostly away fans as we have the higher loyalty points, for those there that werent away fans they had the joy of knowing what it feels like.