as a child i had loved that bit in the movie the guns of navarone where the destroyers had come charging in at the last moment with their horns a whoop , whoop , whooping ; the stuff that childhood dreams are made of , but unfortunately the lady s had gas turbine engines , not steam boilers , but somehow the wiz kids had created a very passable imitation of the real thing , complete with steam , and i quickly found out why they couldnt test it whilst alongside - it was absolutely deafening .