I know right! Possibly the most powerful scene in the whole show, ever. Glad it was from GRRM too. Was reading about it last night and even discussing it with him, the show's creators/writers were like "holy **** - that's full on".
I also enjoyed Ser Friendzone's scene with Dany.
Was curious to see that the White Walkers were created by the Children of the Forest as a weapon against the invading first men. But then they obviously lost control of them.
But the most interesting thing I read about the episode so far that's REALLY got me thinking now, is that Meera defeated a White Walker with a spear that had already failed to kill it when used by a Child of the Forest. So the question raised is this -
does the weapon matter as much as the person wielding it? We know of two others that have killed White Walkers. Sam Tarly and Jon Snow. Sam used Obsidian (dragon glass) but Jon's sword did the job for him. And therefore, is Meera Jon's twin sister?