There was a moment of sound so loud that the aural nerves shut down. When they opened again, somewhere around the pain threshold, they could just make out the opening and extremely bent bars of Fondel’s “Wedding March”, being played with gusto by someone who’d discovered that the instrument didn’t just have three keyboards but a whole range of special acoustic effects, ranging from Flatulence to Humorous Chicken Squawk. The occasional “oook!” of appreciation could be heard amidst the sonic explosion.