There are certain phrases or events which require a ritual response so that my children know all is correct with the world. If anyone says “Cleopatra”, it is vitally important that I immediately reply “Comin’ atcha!” If we see a police car, especially if it is running with lights and siren, I must say: “Oh. crikey, it’s the rozzers!” If we see an ambulance, it is vital that I declare “Ambulance!” forcefully in a bad Welsh accent. These rituals, and others like them, keep the world spinning correctly on its axis.