Saw a role demo last year? at RIAT - by the Lanc! Avro's finest comes battering down the display line and the west end of the airfield erupts. And judging by the way the bang was felt through the ground a few truck loads of Battle Noise Simulators (whaat?) were used. Incidently, I presume there are some wimpy, PC, H&S fluffy bunny bang generators these days? Not like detonating a few gallons of 5-star in days gone by.