For me it was from the film Zulu when thousands of Zulu warriers appeared on the horizon shouting and banging, singing and chanting, rising and falling. "the *** are taunting us!" says one British soldier, "You couldn't be more wrong" replies the local Boer. "They are saluting you!" That is the line I remember.
If I had known, many years ago, that videos also recorded sound I wouldn't have commented, when I was making a film of my sister's wedding, on the outfits the guests were wearing.....the navy blue tights with the white sandals...the frequently falling off fascinator, and the too short trousers of the best man. :-(
So memorable were my lines my sister hasn't spoken to me since.