The annual wake-up call for Greenfield Festival begins with the most ancient and intense sounds as it has become a tradition. When the regional Alphornbläser group blows their alphorns and wakes up the monster that has been sleeping in the Bernese Oberland’s mountains since the past year, you know what time it is. The rowing in front of stage starts all over, the first moshpits and walls of death are being formed and the three loudest and craziest days of the year begin.