Cut Off Before Saying Something Important to the Plot (Spoilers Extended)

Thought it would be interesting to come up with a list of all the times that a character was about to say something very relevant to the reader/plot and was cut off by another character.

Some examples are:

Old Nan talking to Bran

Her voice had dropped very low, almost to a whisper, and Bran found himself leaning forward to listen. "Now these were the days before the Andals came, and long before the women fled across the narrow sea from the cities of the Rhoyne, and the hundred kingdoms of those times were the kingdoms of the First Men, who had taken these lands from the children of the forest. Yet here and there in the fastness of the woods the children still lived in their wooden cities and hollow hills, and the faces in the trees kept watch. So as cold and death filled the earth, the last hero determined to seek out the children, in the hopes that their ancient magics could win back what the armies of men had lost. He set out into the dead lands with a sword, a horse, a dog, and a dozen companions. For years he searched, until he despaired of ever finding the children of the forest in their secret cities. One by one his friends died, and his horse, and finally even his dog, and his sword froze so hard the blade snapped when he tried to use it. And the Others smelled the hot blood in him, and came silent on his trail, stalking him with packs of pale white spiders big as hounds—"

The door opened with a bang, and Bran's heart leapt up into his mouth in sudden fear, but it was only Maester Luwin, with Hodor looming in the stairway behind him. "Hodor!" the stableboy announced, as was his custom, smiling hugely at them all. -AGOT, Bran IV

Sam talking to Jon Snow

"The Others." Sam licked his lips. "They are mentioned in the annals, though not as often as I would have thought. The annals I've found and looked at, that is. There's more I haven't found, I know. Some of the older books are falling to pieces. The pages crumble when I try and turn them. And the really old books . . . either they have crumbled all away or they are buried somewhere that I haven't looked yet or . . . well, it could be that there are no such books, and never were. The oldest histories we have were written after the Andals came to Westeros. The First Men only left us runes on rocks, so everything we think we know about the Age of Heroes and the Dawn Age and the Long Night comes from accounts set down by septons thousands of years later. There are archmaesters at the Citadel who question all of it. Those old histories are full of kings who reigned for hundreds of years, and knights riding around a thousand years before there were knights. You know the tales, Brandon the Builder, Symeon Star-Eyes, Night's King . . . we say that you're the nine hundred and ninety-eighth Lord Commander of the Night's Watch, but the oldest list I've found shows six hundred seventy-four commanders, which suggests that it was written during . . ."

"Long ago," Jon broke in. "What about the Others?" -AFFC, Samwell I

I am sure there are more, and I will try and add any that posters mention, so feel free to post any additional ones that you can find, as well as any thought on what the character was about to say before being cut off. Thanks!

Thanks to:

-u/Wild2098 for finding Tyrion interrupting Benerro

-u/angrymailman for finding Cersei cuts off Pycelle

-u/IllyrioMoParties for finding Edric Storm responds in place of Maester Pylos

-u/LittleZomboy for finding Jaime cuts off Ser Forley Prester