Remember when you were a kid and you rode a steam train? Despite the notice telling you not to, you stuck your head out of the window to see the locomotive chuffing away and to hear the rattle of the wheels on the track as the wind and smoke blasted you in the face. Sooner or later, you'd get a soot smut in your eye and, eyes watering, you'd be hauled back in to the carriage for some serious hanky work. Now you can recreate those days: download this file, set up a fan in front of a smoky old fire and stick your head in the breeze. Then press play...