We quite often have balloons coming over early in the evening at this time of year, dipping low to get the best view of the Cam as they go by. The roar of the gas burners is quite subtle at first but regular enough to get noticed and cause a mad scramble for the camera and a long lens. This one was obliging enough to be taking a slow breeze directly over our house, so I got a few photos. It'd probably help to have a polariser and lens hood (and be a better photographer), but I'm still quite pleased with the image.