Heatseeker, right on the money. A couple of years earlier, my Dad took me to Coltishall open day. 2 things still stick in my mind: sitting in a Spitfire cockpit and then seeing the Firebirds display. The noise of the stream rotation take-off was not just awesome, but as they went vertical, the low freq vibrations thudded through my (then) little frame. I've never since seen a finer (or noisier) display by front-line fighter aircraft in formation. From that day on all I wanted to be was an RAF fighter pilot - eventually I was, but that's another story.