Standing in line to get into the Kremlin. I also paid the tax on my lack of preparedness as it started to pour rain while standing in line. 300 rubles (a small fortune in Russia - about $12 US) bought me a cheap umbrella from quite a salesman who demonstrated the usefulness of his product by alternatively holding his merchandise over my head and then removing it. And of course, as soon as the cash had been exchanged, the skies cleared and I wished that I hadn't checked my sunglasses in the left luggage office.