Some impressions (haha, I said “imp”) from the Game of Thrones SE4 shooting I was able to witness in 2013. You can see the alley Sansa ran down when she escaped from King’s Landing. Takes hours to prepare, gets aired for a few seconds. Needless to say I was pretty stoked when I saw the results on TV. Footage also covers “The Mountain” (Hafthor Bjornsson) rehearsing THE scene, leaving behind a dead prop.
You can find some of it here. http://youtu.be/VrQmG6azyDM?t=23s
(Canon AE-1)