... walking like a man carrying a thermos flask of something that might 
cause, if he dropped it or even thought about dropping it, the sort of 
explosion that impels grey-beards to make statements like "And where this 
crater is now, once stood the city of Wah-Shing-Ton", in SF B-movies. 
        --  Crowley gets out the Holy Water 
            (Terry Pratchett & Neil Gaiman, Good Omens)